eTrailer was the only place I could find the hitch parts I needed for my vehicle. I was worried at first, but they not only had the items, they delivered in 2 days on their 'free shipping' promotion (which is nornally cheapest ground delivery).
Everything worked and the parts fit! They even included a special tool that the manufacture didn't include and special instructions on how to use it to avoid a particularly nasty problem during install.
I couldn't find a better deal in all of my net searches, so I just ordered. I figured even if the stuff was hard to install, I saved enough to pay someone else to make it work (if I had to). So, the fact that my experience was great means I'll but the next 2 units from them as well.