Aftermarket 20s are an unusual LC250 choice. About the closest you might be able to find from JDM might be the Volk Racing TE37 ultra series 20x8.5 +45 or for a more affordable cast wheel, the Work Meister S1 SUV 20x9 +40. I found this video by Work showing off the 20" +40 Meister S1 SUV on a LC300:
Some drivers on here have Method MR318 or other Method wheels that fit that description. Bradley V or Forged Takumi are a LC specialist wheel that also matches those specs. RAYS has more than dozen different 18" 6H wheels that either come stock in bronze or can be ordered.
I have seen some bronze powder coated BBS Pros (+47.5mm) and GX Overtrails (+50mm), they look damn good IMO. Both of those are a higher offset than your window, but options nonetheless. Another, more aggressive option would be the Trailhunter wheels (+20mm). This is of course assuming OE options are in contention for your consideration.
Well, I do wish you luck and I’m positive there is something out there for you. Shoehorning yourself over <10mm/.4” is certainly commitment, but I’m not judging. Show us what you wind up doing.
