That's the down side of buying used gears.
You think you got the savings with used gears but then again it depends.
Most sellers here are honest and quite courteous but some apparently are not that nice or sometimes are too lazy to find things for you.
Agreed with Knownothing, Audioquest is noticeably better than the factory cheap metal bars. But there are other places that you can order the pre-amp jumper cables like the places mentioned by Knownothing and Dr.Dennis
Dr.Dennis had a good idea. Why don't you order both brands online? Keep the pair that sounds better to your ears and return the other pair.
I paid $50 plus tax for a pair of Audioquest Copperhead about a month ago for my NAD C326BEE at a local B&W dealer.
Don't pay more than $60 for a pair of pre-amp jumper cables.
Online purchase may save you some $$$ in this crazy economy time.