From: utzoo!decvax!harpo!floyd!cmcl2!philabs!sdcsvax!phonlab!sdcatta!sdcattb!sdcarl!lin
Newsgroups: net.general
Title: C compiler for IBM 370
Article-I.D.: sdcarl.307
Posted: Wed Jun  2 10:14:24 1982
Received: Thu Jun  3 03:48:12 1982

I think Princeton has one.  Ask the comp center there.