This is World market now, you can get anything everywhere!
https://www.ebay.com/itm/362618782967
One of my pre-gens came with those oversize tyres (Pirelli). It made bike really heavy-feeling with slow handling due to extra weight and more inertia from larger diameter. Really took all fun out of Ninjette as compared to my other exact bike with factory-sized tyres. When I wore those out, I put on factory-sized tyres on, 100/80-16 and 130/80-16