Looking around I caught this site, for those Ontarian's not wanting to deal with Simco Tires and costs. I notice its Canada only.

I have no idea of their prices but see they have split rims, tires , tubes, rim jacks ,valve stem covers, etc. Looks like a fairly new outlook.

http://www.sylmar.ca/autoville/tires/

Where Are You From? Ottawa Ont

Do You own a car built by Durant? 1932 614 sedan