EABCO is good to deal with, have bought quite a few things Contender from them in the past and they had the best price on Timney triggers at one time I was in the market.

Another company for aftermarket Encore/contender stuff it Bullberry, can get about any chambering from them you can think of within reason for the action.

SSK Industries is still in the TC barrel business as well, or were the last time I checked.

Another source for Encore barrels is Bergara (Link below). Pretty well thought of by lots of folks.

http://shop.bergarausa.com/pc_combined_results.asp?pc_id=EAB0F99B4F7549A78AD166D5978D192C

^^^^ What they said.