Did they make 5x4” axles for 8 3/4 rear ends?

I am sorry to laugh but LOL
People struggle to give them away
P.S. Small bolt axles use different drum brakes vs Large bolt axles. If he "swapped" you to a LBP set up and wants to re-drill them, then you will need to get LBP brakes and re-drill those as well.
Sounds like taking one step forward and 10 steps backward.
Not 72dartguy problem. The guy doing the work ordered the axles, so it is his responsibility to make it right.