Hey, I’m the guy who made the thing you linked to. I don’t actually have a FW12 but I could give some insights.
The panel seems to be a -A42 variant of the BOE NV122WUM. (very detailed specs of a slightly different -N41 variant here). I assume you already found this thread?
If I search for driver boards for this specific model on ebay, I don’t find any, but I do find ones for the NV133WUM. That’s a 13" panel that looks very similar. It has the exact same resolution and some variants of it (named -Txx) are is also a touch panels. However, none of the driver boards seem to connect to the second connector for the digitiser. So touch wouldn’t work at all.
I’m afraid that means that someone (you?) will have to make a custom driver board for that purpose. If you do, that would be very cool!