I can't turn the heat off without removing the spare tire to turn the
valve off manually.

I'm told the cable between the dash lever and the valve is kinked near
the dash lever.

Everyone also tells me the cable is no longer available.  But is this
the one I need, apparently in stock at Bus Depot?

http://www.busdepot.com/251265473a

If so, I'm gonna order two.  And tell the shops here in the S.F. Bay
Area that Bus Depot got 'em.