You can easily modify a 2a to accept 120. I just put some spacers in there to hold a 120 roll in the center, use a 116 takeup spool, and drilled a hole in the middle of the back and put a red filter on it. Using numbers 2,4,6,8,10,12 should work - haven't verified since I did that mod though (my first roll I was using the bottom window and thought I had it right, but everything overlapped.)
-I have a brown No. 2a Model B - had to replace bellows. Just used some brown vinyl in the proper shape...not an actual bellows as that turned out to be very tough. So I just don't fold it closed

The 1/50th setting on the shutter doesn't work properly, it sticks open

I should be running some film through it this weekend.
-Have a Brownie Hawkeye Flash. Use a 120 in the supply side, and 620 spool for takeup. Need to get a second one, because you can flip the lens for closer focus. Love that camera.
-Have a Baby Brownie Special. Haven't run film through it yet. Found a roll of film from the 60's in it, and developed it just for fun. Some interesting winter family photos on it. Plan on respooling 35mm onto the 127 spools.