I bought my Lund folding tonneau and Steelcraft Side bars from Truckaddons.com
I was disappointed in that there was essentially no communication from them, and no way to easily check on order status.
I have been spoiled by all the i-net sites that email you a tracking number soon after you order, then you can track your package throughout it's travels.
I got impatient and filled out their e-form requesting an update, it has been 2 1/2 months still no response.
THE GOOD NEWS IS:

I recieved everything in good condition a few days later, ( just over a week from when I ordered the stuff) the price was the best I could find on the net.
No communication was a worry though