You have an interesting gun.

Many folks are reviving interest in that caliber.

Join this forum and get your answer

http://coltforum.com/forums/showthread.php?t=18186

and this one... http://m1911.org/

here there are alot of .38 super enthusiasts who will gladly help you. Let me know which you join in order to check your progress out.
I own a 1911 series 70 mk IV 9mm colt.

Can you post a picture?

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
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1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD