Framebuffer driver for RDI BriteLite IPX?

Hi all -- Sent this query to the Rescue list last week, no bites. Any Sun fanatics here have any ideas? (Linux/OpenBSD appear to support it, but I'd rather keep the OS vintage-appropriate. For some reason...) Got myself an RDI BriteLite IPX; a "laptop" (a generous description) based around a stock SPARCStation IPX motherboard with a very large laptop-style enclosure around it, a 640x480 active-matrix LCD (very pretty) and a gigantic lead-acid battery. It has a handle, so it's portable! Anyway -- I have it up and running and I have SunOS 4.1.4 installed on a fresh hard disk (the original drive was long gone when I got it). Unfortunately, the LCD framebuffer is unrecognized by SunOS; it identifies itself as cgRDI and it's a custom SBUS board that drives the 640x480 LCD. From what I've been able to dig up this driver was packaged as "RDIlcd" by RDI but I can't find it, of course. Anyone happen to have this archived somewhere? Any other ideas? Thanks, Josh