Possibly a silly comment, (accepting what we all think about F.E. kit and the need to reset/rebuild before and during use, and non availability of spares)
Since we are all claim to be at least amateur, if not professional engineers, either in our workshops, or in those of friends, aquaintences and fellow club members, there should be enough material, equipment and expertise to make a replacement.
AND, being aware of the shortcomings of the original, the end product ought to be better in many respects than the original.
Example 1: My bandsaw fed its very thin steel tube bearing separator through the bottom bearing and oilseal. As part of the repair, the replacement separator was a thick walled brass item.
Example 2: My son in law bought a F.E. bandsaw for wood. The gear for the raise/lower of the upper blade guide soon exploded. (A sloppy fitting sinter on a bolt with a flatted shaft) Also the adjusters for the guide rollers had been made, somehow, with the OD eccentric and misaligned with the central tapping.
Cure: Make a gear from the solid, ignoring the fact that the gear was cut using a theoretically incorrect technique. At least tit now works and continues to do so. make new adjusters for the guide rollers with central tapping concentric and in line with the O.D.
"C'est brusque, mais sa travail" as someone said of the unsynchronised gearbox in a car.
If the original design is faulty because of parsimony/poor design/ choice of material, collectively, we should have the skill and means to make a durable, functioning replacement.
After all, if you do obtain a "genuine" replacement, it's going to fail/wear out in the same way again sooner than we would like; so why repeat the error? (Masochists are excused from the last sentence)
Howard