VLTOR are now mass producing their full and semi-auto PKM receivers. They selling PKMs built with their receiver and imported parts kits. Apparently their receivers are better than the original PKM receiver. Obviously the full auto receiver will not be sold to the public.
From VLTOR:

Compared to conventional PKM receivers, Vltor’s receiver is more robust, rigid and wear resistant. Vltor has researched the PKMs history and found the weaknesses of the existing chassis and moved forward to improve upon its design.

For example, the PKM receiver was notorious for cracking around the rear trunnion rivet holes. This was cured through increased strengthening around the said holes. Another downside to the original PKM receiver was the excessive wear on the receiver’s rails. Vltor has remedied the problem by the eliminating the conventional “stamped” rails by replacing them with fully machined, heat-treated tool steel rails. Finally, with the installation of the tool steel rails, the Vltor PKM receiver is less likely to flex or twist during operation, when compared to the original.

Vltor Production Models

Complete Kit of the Vltor PKM

Production Model Hungarian PKMs

Production Receivers

Each kit contains:

1 complete gun (made from an un-issued Hungarian PKMS Parts Kit)*
1 Spare Barrel (matching serial number)
1 Tripod
2 100 round assault ammo cans, with belts**
2 200 round box ammo cans, with belts**
1 spare parts kit (parts that break or wear down)
1 blank firing adapter
1 cleaning kit
1 spare barrel carry bag.
1 tripod carry bag
1 weapon carry bag
1 bag of misc. slings*

*Most of the kits have matching number, including barrels. Tripod serial number does not match the numbers found on the parts kit. **Ammo Cans and accessories may vary in condition.

Marcolmar Firearms are selling the semi auto VLTOR PKMs:

MarColMar Firearms LLC and our manufacturing partner Wise-Lite Arms are pleased to bring you the exclusive semi-auto belt-fed PKM. Incorporating a state of the art PKM receiver manufactured by Vltor, and our ATF approved and exclusive Patent Pending semi-auto striker-fired PK/PKM design, this firearm has been extensively fired, torture-tested, and continuously refined to provide you with years of trouble-free shooting from arguably the greatest GPMG in existence today. Matched with Wise-Lite’s Limited One-Year Warranty and the quality of a brand new Hungarian PKM parts kit, this system will undoubtedly be the highlight of any military weapon collection.

Lucky kid with a VLTOR semi PKM

The semi PKM will sell for US$6075.
More information here and here.

The PKM machine gun according to Wikipedia:

The PKM is a modernized, product-improved version of the PK machine gun. It is just 7.5 kg empty and PKMS version on the light Stepanov’s tripod weights only 12 kg. The PKM and other variants (such as the PKMT or PKTM, its tank version) are in production in Russia and currently are exported to many nations. Additionally, various models are manufactured locally around the globe. Zastava Arms produces the PK under license as the M84 (along with the PKT as the M86), and it remains in use with many of the former Yugoslav successor states. The Chinese-built Type 67 also features notable design similarities. The most recent modification is the Russian Pecheneg, which features a forced air cooling barrel that, unusually for a modern machine gun, cannot be removed in the field for quick replacement. The PK and its descendants will continue to see service throughout the world for some time.