You can buy reinforcement brackets from "the door company". This is the company that installed my garage doors. I bought two brackets ($15 each) and installed them myself. Very good product, should be good on any garage door. Following is their website. The Door Company - Welcome To Our Website!
The very top panel needs to be re-enforced too. A long steel bar has to be in place first. The vertical piece from The Door Company needs to be screwed onto that long piece.
It is not a bar, but a 7 feet angle, I bought one at homedepot yesterday. You can also buy vertical reinforcement at homedepot as well, the same angle but shorter and cut the length to suit. $ 9.99 each.