if the pawl pivot pin broke, you'd want the entire trip operating lever assembly (17 in the diagram below).
however, ya said it was one of the smaller pins the spring connects to, so yup, you could drill and insert your own peg of some kind. There's not much force on the spring, so if you had the original peg piece, you could probably epoxy it back on ... maybe drilling/installing a smaller dowel in the joint if you want it bulletproof.
if you're in the USA so shipping is prohibitive, I probably have the entire lever in a parts box ... email me your address to slotpics@cdyn.com and I'll see if I can find one.
emailing lots of highest possible resolution pics of the game front and internals to that address would be great too ... especially the top lamp panel both sides, inside of top compartment, the dual payout counters and all sides/top of the reel mech.
the pics will get posted on
https://bingo.cdyn.com/slots ... what's the full model number of your machine?