All, I wrote Diamond Back Tires about obtaining 185-80R13 tires and they responded that they "add whitewalls to modern radial tires. You can order a 135/80R13 with a 5/8" whitewall from us. These are $172 each plus shipping." Their website is: http://www.dbtires.com/ So it looks like we'll have to start ordering collector tires from this vendor. -Mark Corbin