Another round wound 12 set with a plain G is the Thomastik Infeld Bebop BB112: http://www.juststrings.com/toi-bb112.html
12 16 20p 28 36 50 Nickel!
Yeah, you guys make a good point that I might not care for the balance. Now I remember I did have that issue with some T-I Bebops, where the 3rd was crazy loud. But that was on a Collings City Limits (think Les Paul). I wasn't sure if it would be as much of an issue on the archtop. But I didn't want to risk another friggin $20 on a set.
They didn't work so well for me...