Depending on your case/PCB, you might have to get a stabilizer specifically for that. For example, KMAC only uses PCB mounted Cherry stabilizers. If you clip those, they feel really nice and makes switching caps easier than Costars.
Case doesn't really have anything to do with it. It's dependent on your PCB and plate. A GH60 has slots for PCB mounted Cherry stabilizers. Also, most of the plates that are made for it allow for the use of both plate mounted Cherry stabilizers and Costar stabilizers (which are only plate mount), as well as allowing PCB mounted Cherry stabs to be used, if so desired.
Technically, you could build a GH60 in the ANSI Poker design you want without a plate, just like an original Poker. You would use PCB mounted Cherry stabs in such a case.
Honestly, the case will probably be your hardest find. You might have some luck searching for a regular black Poker case (or not...) and painting it yourself.
I may have an extra GH60 PCB when everything is said and done, if you have no luck finding what you're looking for. I also have a red Poker plate from a Duck Poker. It doesn't allow you to open switch housings, such as the GH60 plates do.