Yesterday I met a machinist here in Alaska who has been making nice QD rings for the CZ series of rifles for awhile.
His passion however is Mausers and he showed me the new triggers he is building for them. They are basically Win M-70 style adapted for the M-98. He has a large number of both the rings and the tiggers in stock. I was impressed enough that I picked up a set for my MkX .458

He has a web in case you with to take a look

www.alaskaarmsllc.com