Stockeys stocks has them. Manners with mini chasis etc. And all the stillers I had fit directly into rem 700 inlet stocks depending on barrel channel of coarse.
Greg Young is a "Hide" member and usually has Stiller stuff in stock. He recently moved to Tennessee but still is moving product. His business name is Southern Precision Rifles.
Tac30, 30AW fit the 700 inlet. I have a 30AW and bought a stock inletted for a 700, just make sure the recoil lug is the same size or inletted for a larger one that fits the Stiller.