That is credibly expensive to do. Like I stated, the bigger PreFab issue is that is wasn't more widespread. From what I understand, the whole manufacturing process for the PreFabs are a pain in the ass based on the size of the milling machines needed. There's a reason that SFGAdv chose to replace track themselves and it has little to do with time, acclimation, or finding someone to mill the wood.It would seem odd if the specs for each piece weren’t included with the purchase. Having to get replacement pieces from Germany would take weeks at a time between fabrication, shipping, and acclimation. There are certainly plenty of woodworkers or cabinet/furniture makers in central NJ that have the tools and skills to custom build track pieces.
I dunno if this has ever been shared but this basically breaks down why the prefab isn't that great and hard to do what needs to be done: