Shayne, if you strip one of your trailers hubs and check the bearings inner diameter and do the same for a 6 stud hub bearing outer diameter then it might be possible to match up a set of bearings that will allow you to mount a 6 stud hub on the rapier stub axles, just need to check that the inner and outer bearing positions match closely enough that the retaining nuts etc will secure everything.
Could a collie rear axle set up be modified to mount to your trailers suspension?
I ask because I think that a 80 series rear axle could very easily be turned into a trailer axle, especially if the donor axle was a drum brake set up.
As an aside I have often contemplated building a overland trailer with independent suspension for ground clearance that would utilize Lc 80 front stub axles and hubs less the swivel housing but with disc and calliper, because then I would have a matching set of spares that would be relatively easy to source, and in a roadside emergency replacement parts to get me out of trouble, having said that front stub axles and hubs are the last thing I would expect to give me grief, bearings perhaps.
Just some ideas that you have probably already thought of, or not.
I understand your frustration after all the times I have had trying to make a plan to get something to work in a way it was not designed to.
Farmers make a plan, especially in the old days in the Zulu land bush
