[200q20v] seat heater, inside door handle, auxiliary coolant pump

[Vztante at aol.com]

Hi all,

I am considering purchasing a 200tq that has a broken interior passenger door 
handle.  Is this readily available, or a tough one to track down?  It may 
have been shared with the V8 and earlier 200s, which I would think would make 
it fairly common.

The driver's seat heater is not working.  The seller says that "Maybe 
the connectors are dirty on the switch....." Any experience with seat heater 
troubleshooting?

It is missing an auxiliary coolant pump.  What is it and should I have it 
replaced before driving the car the 1200 miles back home?

Trip computer is not working.  Is this a big job...worth fixing?

Thanks for any feedback,

Mitch Frey
'91 Miata "Torqueless Tailwagger"
'00 A6 2.7t