I used to see a variety of adapters & spacers in the '70's for custom wheels. Maybe some custom wheel companies, especially ones that cater to import car "tuners" would have something. The discs on my Aero are '98 to '02 Honda Accord 4 cylinder rotors, same bolt pattern.
I'm thinking the rotor hats were about 1/4" + thick, and left me a couple threads short in the lugs so I replaced studs with slightly longer Jeep studs.
You might be just as well off to mount a wheel without the spacer washers, measure the exposed threads & have a machine shop cut & drill a couple discs the right thickness.