I agree, Dexter has been great. You are asking for something more than what is typical.
But regardless, just google dexter and you'll have lots of contacts to ask your questions.
https://www.google.com/search?channe...er+parts+axles
I suspect you have a 7K axle which there are a million out there you just need to know which one goes on your trailer.
Also:
https://www.dexteraxle.com/store