1956-62 235 & 261 engines:

Rod bearings: Federal-Mogul part # 6-1950CP(set)
Individual rod bearing part # 1950CP
TRW part # CB146P
Undersizes available: 1-2-10-20-30-40-50-CA60

Main bearings: Federal-Mogul part # 960M
TRW part # MS1721P
Undersizes available: 1-10-20-30-40-50-60

The above numbers are from the Federal-Mogul master bearing catalog. Most automotive warehouses that have been around awhile will have access to those parts, but don't count on the amateur do-it-yourself stores like Auto Zone, etc. to be able to order them. NAPA should be a good source, even if they have to cross-reference to their own part numbers.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!