Will someone please tell me the part number for the Carrier furnace (58RAV) draft safeguard switch from an 1999 installation? It isn't in the owner's manual (as it should be).

A place to purchase said switch would be nice too, since carrier won't sell it to me 'directly.

I've already gone one round purchasing the wrong part (too low cutoff temperature), so I'm a little gun shy now...

Thanks, Wiliki Kilika (aka Engineer Chris)