This has probably been covered here before... but Yes, there are alternatives to going off to Schuck's and getting a 50/55 or whatever stock is. My personal favorite (maybe not the cheapest, but I've had good luck) is
www.autobulbdepot.com
Or you can go to a local 4x4/Offroad or performance car shop. PIAA has a bunch, Hella, etc. I'd choose something like the PIAA platinums if you want to maintain 50 state legality w/proof (keep the box in the car). If you don't care then I had good luck with Hella 80/100s.