There's plenty of info on the
Ibanez USA Custom Shop at this link:
http://www.jemsite.com/usa/usa.htm
At no time would Ibanez customize ANY model a customer wanted-the
USA Custom Shop only dealt with RG bodies, and the customization was pretty much limited to necks, pickups and finishes. However, there was a set list of finishes offered (none of which were floral patterns). I suppose that there is an off chance that it could have been a Hoshino or Chesbro employee guitar (like Kevan's doubleneck FP).
As far as I know, the (3) MetalDesign finishes were the only USA Custom fabric finishes, and none of them were fabric.
The best thing would be to have some pictures of your guitar though

I'm sure that that would greatly help in determining exactly what it is.