That's going to be a tall order to fill; asking for USA, Long Length, Fine Tooth, and Quick Release. Most USA made ratchets you'll be lucky to get two of the three, and once you get into the industrial brand offerings, most are not fine tooth.
Here's a few quick finds with some catalogs I have:
Armstrong 12-994 1/2" Armstrong MAXX Locking Flex Ratchet (88 Tooth, 18.5" Length)
Armstrong 12-973 1/2" Long Handle Teardrop Ratchet (36 Tooth, 15" Length)
Matco CFR158T 1/2" Ratchet (88 Tooth, 15" Length)
Matco CR17LFT 1/2" Locking Flex Ratchet (88 Tooth, 17" Length)
Matco CFR248LFT 1/2" Long Locking Flex Ratchet (88 Tooth, 24" Length)
SK 40170 1/2" Professional Round Head Ratchet (48 Tooth, 15" Length)
Williams S-52EHLA 1/2" Enclosed Head Chrome Ratchet, Long (36 Tooth, 15" Length)
Williams S-53A 1/2" Round Head Chrome Ratchet, Long (72 Tooth, 15" Length)
Note that none are quick release. Also don't buy any Matco Comfort grip ratchets, the grips are imported, so the ratchet doesn't have a USA stamp.