Ruger made Marlin cap ten in for friend compatibility with older parts?

I have a Ruger made Marlin 336 Trapper, and today I noticed my forend was loose, so I took off the forend and everything and when I went to put everything back on, I was tightening the forend screws and when I was doing the other side, it popped out on the other side and I’m pretty sure it stripped. It’s my fault, but I’m wondering if the parts I see on EBay would work if it’s an older Marlin part. Don’t want to spend the money and it not work. Trying to avoid Marlin asking me to send the rifle back in. Thank you for the help.