Are there any vendors that sell pre-made link bars at various lengths? I can't seem to find what I need?

You mean 4-link bars? Any shop that does suspensions should be able to build what you need. Material diameter and wall thickness, threads and length. Tubing and thread inserts.

Tractor supply has a great selection.

Kidding of course!

You say that but the owner of the Big Iron match racer had me crawl under the back and asked me if I recognized his upper bars.

They were the upper adjustable links out of a three point hitch for a tractor!

I make my own.. that way I can make them to
the length I need.. I build ladder bars for the
same reason.. all moly and stainless inserts..
for most of that stuff I order from S&W racecars
or just buy from my local moly supplier and weld
them up myself

Call Rhodes Race Cars.He will build whatever you need.

Thanks for the input guys. Yeah, I meant suspension link bars.

Where do you guys get your threaded tube insert? I need two of each RH and LH 3/4"-16 threads.

Summit has them.

Speedway Motors. We used their stuff a lot for our sprint cars.
Good products and a fair price.

Digger73 (Mike)