The ones on ebay will get you started but it doesn't include everything you need.
You will also have to buy the absorber which is another $260 (
https://www.ebay.com/itm/403635355406), a wire harness for the lights or the new added lights will not work $118 (
https://www.gen5diy.com/collections/...-light-harness), and all the hardware needed to put it all together about $40 for all of it. (GM part numbers WF34474, WF68115, and WF56150).
Buying it like this puts the total to about $1,250 so not that much of a savings.
When I did mine, I went ahead and spent the extra $100 to let someone else spend all the time and energy tracking everything down instead of me buying everything separate but that's up to you.