Holley stumble trouble

Haven’t seen any follow up on what you ended up doing. What and from where did you source the pin drills. I’m not seeing much for drill sets in searches for sourcing the bits needed especially for the IFR’s.
Amazon and McMaster Carr have the small drill sets.
Locally you can try a hobby shop if you have one close by.
https://www.amazon.com/dp/B0916CQPQ3/?tag=fabo03-20