Jay,
I'm not sure that the WRV codes would be much help anyway. If you go to
Alpine Coach - Technical Information you'll find codes for 1999 and 2003, which may or may not match. Just to complicate matters, somewhere around 2001 WRV had gelcoat standard and full-body paint optional. You might try this contact (it's still current, I think):
Industrial Finish 1-800-531-1305
Brand of paint; BASF Dimont
Frank