So I was out at the range saturday and found that the 338 was a little much so i took the scope off of it and bought some Leupold rings and was putting the scope on the 264 and somewhere I lost one of the screws

Didn't think much of it I have a couple other sets of old rings and got a screw out of those but it is to small in diameter and doesn't work. So does anybody have a screw for a set of new Leupold rings laying around? I really don't want to go buy a second set of rings. Someone at the range suggested just taking them back and saying there was a screw missing but I can't do that because I lost it and wouldn't feel right about it.
Thanks