Yes, 32GTR and 33 Gtst S1 are the same coil packs.... think the splitfire # Is DIS-0001 or something.... around 400 ish these days for new ones, I wouldn't bother stuffing around with second hand ones. .. might find they have the same issues...
JJR ones are $399 a set but I have not had any experience with theirs.. most opt for the splitfires. Or genuine... think it works out around the same price if you have access to a trade card