I think I found the answers, posting them here so one less person ends up needing to search that other site. (I need to make a Tools magazine to ask questions in)

• Harbor Freight Earthquake series. Their stubby is actually decent https://www.youtube.com/watch?v=jqWypTAG4Hw

-A Used Chicago Pneumatic, not to be confused with Harbor Freights Central Pneumatic. They are $50 used all day, reliable, and can be rebuilt. https://www.youtube.com/watch?v=KTdKYtqO94I https://www.youtube.com/watch?v=GzRlXSIMeeQ

• AIRCAT 1150 if you want a lot of torque. Small premium over the Harbor Freight offerings, but more reliable.

UPDATE: Changed the o-ring and it holds pressure now.

I took it apart to clean, and the o-ring is shot. Will get a new o-ring tomorrow. Thanks for your help everyone!