I've been working on an older .22lr. The firing pin block was broke. Found another as replacement. The original used solid pins to hold the combo firing pin/ejector. The new block has too small of holes for the original pins to fit. The pins are larger than 5/64", but smaller than 3/32". Drilling the holes to 3/32" is not an option as one pin will then have too much slop and it will allow the pin to drop into the trigger assembly. Can I use 3/32" spring (roll) pins? What is the best material to use?