Where can you buy a slug barrel for a Traditions ALS 2100 20 gauge?

Youo may be able to post on a shooting forum as I did when looking for a 12 guage slug barrel. Traditions imported these guns from a company in Turkey named ATA. I tried to contact them by email with no success. I also contacted Traditions and was told no part or accessories were available for that model. The Word is Stoeger's are very close in build to the ALS 2100 but that's not a chance I'm willing to take.