You've already got a jockstrap, so the only other thing I can advise you to do it to stock up on bags of frozen peas. They're cheaper than ice packs, and they form to your *ahem* man parts better so they provide the cold where it's most needed.
Dave had valium before his and percocet after. I recall him sitting on the couch with frozen peas on his 'nads, counting his pills and saying 'I can be stoned for 5 whole days if I play it right!' with an delirious look on his face.
He doesn't remember any of it, of course.
I wish I could say I feel for you, but as I don't have balls....I can't. I can tell you how I pushed out a 9lb baby with no paid meds if you like, though!
Dave will be home tomorrow, I'll ask him if he has any advice for you.