Dunlop makes tires in the correct measurements
Be careful which dunlops you get though. There are considerable first hand bad reports about them on one of the forums I frequent.
I had one on my front, I don't recall the model, but it's in the shed, I can go look, and it cupped long before its time, even though the tire pressures were right from the time that I got the bike. Of course what the PO did, I have no idea.
Similarly, the dealer I deal with, said they stopped carrying Avons, because of HUGE numbers of warranty returns.