Where can you find a parts list for a marksman 1010?

It's not cost effective to repair the Marksman for several reasons. It's one of the least expensive air gun available. It cost around $20 brand new. It rated at 200 FPS. A Daisy is rated at 350 FPS. It's made of "Pot Metal" and most air gun repair shops won't touch them, because it would cost more to repair them than just purchase a new one. However if you want to get it fixed you can do a search on the Web for "air gun repair" and see if you can find a shop to have it fixed.

BTW There are several you-tube videos on how to take them apart and put them back together.