Yeah, I think they're clearing out a lot of slow-moving older stuff to concentrate on bits for dinged moderns. They don't have any sills for Imps in stock, and they were on Hadrians website since forever.
Will be interesting to see what they do with the classic side of the business TBH.
They stopped listing 300 series stuff but once I gave them a call they said they'd be interested in offloading the stock they have. Perhaps it would be worth giving them a call?