Films who's original process no longer exists. Your only option is cross-processing. Have Fun!
TriFCA 35 Color 20exp - Expired 1975
Kodak Kodachrome 40 Super 8 Cartridge Type A - Expired 1999
Kodak Ektachrome-X 20exp 110 format - Expired 1976
Adox HR-50 - 36exp
Adox Scala 50 - 36exp
Agfa APX 100 36exp
Agfa APX 400 36exp