Good place to buy Wireless Equipment?

I am looking at doing a small wireless deployment for a local campground. I am looking at doing a WRT54GL with DDWRT in a bridge repeater from their main office connection (Netgear Wireless Router) to a barn about 300-400ft away. Then from the barn, there is good line of sight to the camp sites about .5mi away. I am looking for cables to extend from the WRT54GL to a directional antenna mounted on the side of the barn. I was doing some searching and come up with a few sites, but wanted to see if any of you have dealt with a similar project and found a good site to use.

Any suggestions are welcome also as to what to use for antennas and cables.

Hyperlinktech.com has custom jumpers they can make for you.

How long is the cable run?

It looks like the run will be less than 25'. It will like from the router inside the building to the antenna on the outside of the building.