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If you are replacing the stock for stock components, Wilcox.
If you are looking to upgrade the system look at Borgeson.
If you want to go rack and pinion there are several manufacturers with rack and pinion systems.
What you have to understand is most of the parts come from a common supplier(s) so it comes down to getting the best price and shipping on most. Now the service offered by suppliers runs from very good to criminal so you should do your homework.
Then there are known issues with new parts that just get ignored, like parts that don't fit, parts I have to fit or machine, no QC at all, etc. Example= every TA backing plate I got in the past 15+ years has the large hole off. EVERYONE, I don't care where I bought it from since they most likely came from the same place that made them. Parking brake hold down pin with bad stamped heads. The one I am working on now I have to face the star wheels on. This shouldn't be the case but it is, so other then a rant, check your parts when you get them.