Need 3rd brake light for 01, w/ LED strip...where to find?

Hello guys, hope you can help.

My boss has a 2001 Yukon and his 3rd brake light has gone out. He says it is a LED strip type light rather than the lamp that uses the 2 bulbs. All of the parts websites I have browsed show just the "2 bulb style" and not the LED strip.

Does anyone know where I can help him find a replacement at before he goes to the dealer??

Thanks

I know this is late, but there is a dealer on Ebay that sells them much cheaper than the dealer. HTH