So he probably can't make one for a Windy, due to the recessed screw holes?
FrancoB can make repro marquee holders for:
Naomi-Egret2-Egret3-AWSD-Astro City/2-New Astro City-Aero City-Namco Exceleena 2-Cyberlead-Jaleco Pony MKIII 25
Unfortunately I've never seen a Windy in person with or without a marquee holder. So I'm not sure if the marquee piece just has recessed/countersunk screwholes or if there is some other trick to it. From photos I've seen it looks like something that should be doable. The trouble with the piece for the Blast City is that it is acually a more complicated injection molded plastic piece not some sort of simpler acrylic piece that was cut and then polished.
While he doesn't currently make repro pieces for the Windy, it might just might be that he doesn't have access to an original to take measurements. Or maybe nobody has requested one. I recommend contacting FrancoB directly and asking him if it is something he can do. You can find him over on Arcade Otaku. You can drop me a PM if you need his contact info.
Your cab looks great with the control panel you redid, so the marquee holder would make a great addition to literally and figuratively top the project off