I have the 1st generation LoD Bumper and I was trying to see if the 2nd/3rd generation add-ons would work on it (Gas Can & Safari Rack). The customer service never answered the phone, the tech support never answered, it kept ringing. never got a response from the email system too. However, the bumper I have is really great and no issues with it. It came with the Jeep when I purchased it.
My advise is to get it all at once and make sure you have a good contact number, so you can get someone directly.
I'm still pondering about calling them again, and try try again. Ya never know, maybe it's me!