Good kit for repairing iPhones? Can someone recommend a good kit for repairing iPhone 4s and 5s?

We have a whole fleet of iPhones here and they often need to be repaired.  If they are beyond EOL or we aren't getting a warrenty on them, I'd like to be able to get as much life out of them as I can.
If you look on ifixit.com  for their iPhone tear downs.  

The not only show you how to do each iPhone but also list the tools they use.

iPhone 4S

iPhone 5

iPhone 4

For example: iPhone 5

iPhone 5-Point Pentalobe P2 Screwdriver,
Tweezers,
Phillips #00 Screwdriver,
Small Suction Cup,
Spudger