I beleive the wheels made for those years were as follows (corrections welcome). All were the "thin" five-spoke design, but varied in paint color or polished, and construction (cast or forged)
1996:
- white painted cast (white/blue '96 RT/10)
- yellow painted cast (red/yellow '96 RT/10)
- silver painted cast (black/silver '96 RT/10)
- polished & clear coated cast (blue/white'96 GTS/Coupe)
1997:
- polished forged (all - both RT/10 and GTS)
- gold "sparkle" painted forged (10 sets made?: 3 for '97 RT/10 & 7 for '97 GTS)
- yellow painted forged (14 made for '97 GTS)
1998:
- polished forged (identical to the '97 polished forged)
- painted forged (38 sets made according to build info, don't know color)
- BBS (GT-2
Good luck getting a sample of the '97 yellow forged wheels - its amazing enough that you got the gold sparkle-painted wheels, as those are even more rare. There was no silver "sparkle" that I'm aware of unless those were the ones made in 1998 - otherwise, perhaps you're thinking of the '96 black/silver roadster silver-painted wheels?