Yeah, slim pickins... Thanks for all your help, Ivy. Looks like there's 2 options for me - the Milestar, and Kuhmo. I may just bite the bullet and go for some 15" Konigs. I've still got a few weeks before she's road-ready, so I'll hope for a miracle.
It's hard to believe with all the older cars out there running smaller wheels, there's not more of a market for these tires.