Frogwalking,
OK, a 3/32” hole means the outer diameter of the spring must be a bit less than .09375”. If the detent ball sticks out just a bit, then the spring should be close to the ¼” or slightly longer so the detent ball will be under tension.
Tip 1. When I lose a tiny part in my workshop floor, I lay a flashlight on the floor. The beam will show parts even smaller than this by the shadow cast behind the part. If that fails, I drag a magnet across the floor.
Tip 2. When disassembling and reassembling things like this, do it INSIDE a clear plastic 1 gallon Kitchen Storage bag or a clear plastic bag that is even larger. If the detent and spring escape, most of the time they will stay trapped inside the bag. (That is experience talking. GRIN.)
I don’t have the complete set of Detent Balls Brownell’s sells, but I have some. I know I have smaller and larger ones and will check to see if I have that size. I also have a LOT of springs close to that size, but I’m going to have to go through many gun parts boxes to hopefully find one, so it may take a day or two.
I checked out your location and it seems you are not far from Richmond. There is an upcoming Gun Show at the Old State Fairgrounds (now called the International Raceway) on February 1-2 where I will have tables set up. I would be glad to help another forum member at the show, if you are still having trouble with it. If I don’t have the part or parts, there is another dealer who comes to the shows and he may have something that will work. If you are interested in doing that, I’ll PM you info on the show.
Gus