I see Nick has some on Ebay,
M1 CARBINE REPRO 1 BARREL BAND type 1A - eBay (item 350187548286 end time Apr-13-09 10:11:26 PDT)

Ask him how many welds are on it.
Beware that most of this repro stuff.....won't fit like original parts.
Or by removing a later type bayo band........the barrel will show the wear of the later band.

Good Luck
Charlie-painter777