Is this the guy in Florida? If it is, I could never get the gas checks to fit on my bullets. Sent it back 2 times to try to get it to fit. Gave up and just went plain base
Got any old ball bearings? The one in your old tool head is probably peened around the hole to hold it in. You should be able to get a few off of Amazon. I know I seen them when looking for them for a monkeys fist.
I have got a bunch of springs from Ace Hardware and Truevalue before. Homedepot has a bunch too. We have a Farm & Fleet here that carries them too. They are usually in the smaller boxes above the regular bolts and nuts.