Bullberry has some nice Encore barrels. They use Douglas blanks as well as some others too i think. The BullBerry cost more but they also use a different hanger system for the stock.

EABCO also sells Encore barrels. I think they use Shaw blanks but not sure. Kinda pricey for a Shaw blank IMO if you consider the cost of the MGM is only a few bucks more and ships free too.