To my knowledge, the only parts that were around were handled by Pro Circuit in the US... you could get an Asch pipe...only ever saw one here on the West Coast.... and as for Mossbarger...I have a complete Mossbarger reed set up for a 430 which is quite a bit different (larger) whilst still using the original pattern bolt on...but the 250 arrangement is quite different and not sure about how the Moss would/will fit...the 250 has a built in main reed block as part of the cylinder... Mossbarge are still manufacturing as week speak...so maybe you could contact them and see