LEDTrailerlights.com is listed in the master thread about LEDs.
When I ordered from them a while back, they asked where I'd heard about them, so I pointed to that thread.
Much to my surprise, they said they would offer a "coupon code" for Keystone RV members to use, to get a discount for LEDs. They are revamping their website to a totally new shopping cart platform, and that's where you go to place the order and use the coupon code. (coupon code works on the new website)
Coupon code is: keystone (you plug it in during checkout)
On the home page of
www.ledtrailerlights.com click the link to the new site and place the order there. It sounds like the new site will be taking the place of the old one in a few weeks.