I seem to remember someone here saying that they bought some Talley mounts a few years back, but the search function here wont go back that far. It looks like Conetrol still lists them, but they are pretty spendy. Only other solution I know of is to watch fleabay. They pop up there once in a while.
IMHO people who take rings and mounts off when they sell a rifle should have their fingers broken.
Jerry