It’s here! GMK Miami Dusk! Purchased from Mech Supply in June and they turned up a month before they were expected! Result!
This set is manufactured by GMK in Germany and features double shot keys. They are a Cherry profile set and will fit Cherry switches (and clones). This set can fit up to a TKL in either an ANSI or ISO layout, with a standard bottom row.
Here is the set on my Pok3r, still with the white plastic case. It has Cherry MX Blue switches and a custom Pexon cable.