I have a set of original 4.5 inch steel wheels, but I'm having trouble getting 175 HR-14 tires. One tire shop traced back the "HR" designation and said it would be 1.5 inches greater in diameter than any 14-nch made today. I'm trying to get my '71 240Z back as close to original as possible, and I have the original restored hubcaps and 4.5 inch steel wheels.

Any thoughts, wisdom or suggestions would be appreciated.

Look here: https://cokertire.com/amfinder/index/index?finder_id=33511382