If he's not from Des Moines here are some hot IPA's right now and where you can get them:
Barn Town Appaloosa-They do crowlers, not sure if they do it for this release
Pulpit Rock Gravy Boat-El Bait-They do crowlers
TG ZeeLander-Iowa Taproom-They do crowlers
TG Fire Skull & Money-Should be able to find 4 packs at places like Urbandale,Waukee Hy-Vee
Brightside All Hops Considered-El Bait-They do crowlers
Franklin Street Drugstore Cowboy-El Bait-They do crowlers
I now see he's from Des Moines. I wonder if he's on Untappd so you could find some that he hasn't had. If he's an IPA fan he's probably had the two from TG but may not have had the others.