2003 Cadillac CTS compact spare works. It's a light aluminum rim and it fits in an A-body spare tire well. I'm not sure what all years will work, but the junk yard should know.

1968 Valiant Signet 4dr. 273 4spd
1969 Road Runner 383 4spd
1969 Barracuda 318 auto
1970 Dart Swinger 340 4spd
1975 Cordoba 400-4bbl
1988 Caravelle 318 Auto
1999 Dakota R/T
2000 Viper GTS
2001 Ram 2500 Diesel 6spd
2018 Dodge Challenger GT (Winter beater!)