I recently saw the movie In Time, written & directed by Andrew Niccol (Lord of War, Gattaca) and starring Justin Timberlake & Amanda Seyfried. Many of the characters carried in the movie used Glocks with shiny stainless-steel slides. Timberlake can be seen holding one of these Glocks in the promotional poster below.
I struggle to understand why Glock does not manufacture a two-tone model. Even if they just did a limited run, they would make a fortune from them.
If you want a stainless slide for your Glock now, your best bet is an aftermarket slide from Lone Wolf. They sell for about $200-$300.