FUSA, can you explain your "no longer true" rims in what direction there's a out of spec problem?
I've seen rims that have an axial wobble left to right like after smacking into a curb or sliding on ice impact. Not a radial out of true or round from a straight in impact problem without rim bead spreading or a flat spot condition.
I'm on the hunt for 18" rims looking to replace 16" rims on my 95 D1 yet still maintaining 5 x 6.5" (165 mm) vs later 120 mm rim bolt pattern.
Tire shop monkeys can bend these 16" rims trying to break the super high bead locks or retaining lips causing now a axial rim wobble. Minor run out an axial wobble (beads vs mounting surface) can be eliminated if only a minor wobble by placing the rim on a Bridgeport mill and removing a minor amount of material until the rim mounting surface is completely machined across.
Minor like 0.008" to 0.020" maximum without causing any weakness of the mounting surface. Tyre shops can (will) destroy these LR alloy rims trying to break those super tough and high rim bead locks. I've saved several LR rims in the past helping friends without any safety issues. Just have to know when to call a rim scrap vs repairable, a judgement call.
I know i'll be called out preforming an UNSAFE PROCEDURE.
You would be amazed watching how much straightening rim repair shops can heat and hydraulic press out large flat spotted rims back to round and true again, many rims I would call trash can material. Go on line and watch a video. .....~~=o&o>......