I spoke to Keith at Total Seal and he had recommended the M3690 45 rings.
http://www.summitracing.com/parts/TSR-M3690-45/
I have no experience with gapless rings but it threw up a red flag. He basically said they aren't as strong but they will work and won't destroy my cylinder walls nearly as much as a gas nitrided ring would.
Also the TNT series don't seem to be abusive:
http://www.summitracing.com/parts/TSR-MT3690-45/
HELP!