replacing composite headlights, HELP!

I have a 92 Sierra w/ composite headlights that have yellowed thru the years. I've used rubbing compound many times to get them clear again, but this is not working to well. I am looking to replace these, but I hate to spend the $300 at the dealership for these.....any suggestions?

I saw these on EBAY and I was wondering if anyone knows anything about these?

http://cgi.ebay.com/ebaymotors/88-98-GMC-SIERRA-EURO-DIAMOND-HEADLIGHT-90-91-92-93-94_W0QQcmdZViewItemQQcategoryZ33710QQitemZ80045410 79QQrdZ1QQsspagenameZWDVW

LMC Truck (www.lmctruck.com) has composite assemblies for 89.95 each.

//2000CAYukon

Go to a junkyard that sells new parts. I had to buy new circuit bords for my 89' Sierra. At a Southtowne GMC dealership they were $64.95 a piece. I went to a junkyard, bought brand new ones for $24.99 a piece.

Or, try this website http://www.partstrain.com/products/Lights_(Front)/1989~GMC~C!K_FULL_SIZE_PICKUP.html I have never used it so I don't know how reliable it is

u can get new 1 at ck resto 4 150

thank you guys for the info! anyone else have more they can add?

ebay