I know for the 9a I am building, I went to HF to get bits and bought a bunch of 1/8" bits. I must have bought 50 of them. I still have almost all of them and have re-ordered #30 and #40 bits several times. I don't think I ever used 1/8" for anything? The thing I really liked was using a reamer over a drill bit for the match drilling. No need - or very little need to deburr when you use a reamer over a bit.
If this is for an 1/8" solid rivet (AN470AD4 or AN426AD4), then the final hole diameter needs to be #30 for a proper slip fit (an 1/8" rivet won't slip into an 1/8" hole).
How you end up with a #30 hole depends on the situation. But one good general approach is to get your parts to where they're match-drilled (or pre-punched as the case may be) to 1/8", i.e. under-sized, and then match-ream them to final size using a #30 reamer bit. This technique will give you good clean concentric holes (proper de-burring still required).