Cars, chemical sensitivity & how to solve this??

I'm having a hard time finding a car because of reactions to the chemicals.  Any ideas?

Problem one is I need a super low seat such as in a sports car to keep the neurally mediated hypotension (low blood pressure) from triggering.  That limits the models I can consider.  

Problem two is that I'm reacting to both the new car chemicals even in 12 year old cars and also to anything a used cars been cleaned with or perfumed with.  Symptoms are inflammation style such as joint pain, muscle stiffness & pain & weakness, internal pain in area I had surgery last year.  Plus nausea, headache, eyes tearing, shaky, and emotional change of becoming totally hyper (in Cadillacs), iching (saturn s-series).  Symptoms vary a bit from car to car with a tendency to a "pattern" for each model.  I know it's in part the new car chemicals because I've found private own cars that have never been back to a dealer for sale and still reacted.

Problem three is that I'm CFS noise sensitive so some model's low growling exhaust is too much for me.

I'm not generally that sensitive at home.  I survived new carpet in the house.  I use some household cleaners no problem.  I react to a lot of meds and some foods and I can't burn some scented candles, and I can shop but couldn't work in a store with lots of new plastics like the dollar store.  

I've tried air purifiers, expensive VOC ones, and some help a little but not enough.  Actually blueair's .1 hepa smoke stop seems to do better than the pricy ones.  Some dealerships have tried steam cleaning and it helps on perfumes somewhat.  Cars with sunroofs that the owner says they "loved" seem to do better so it seems like airing out helps.  I've been looking into aftermarket seats, but it's a whole adventure.  The disablity car places I've contacted don't deal with this and just help with routine stuff like installing lifts in vans.  I've tried finding sources, chat rooms, of MCS online with their experiences and haven't found ones.  I saw an environmental doctor but his suggestion was to fix me with his new experiemental idea, and that he personally cleaned his car some 6 or 7 times with ozone and cleaners before it was okay.  I'm unsure of trying ionizers because I'm definitely reactive to the ozone and I don't know if it ever fully leaves the car afterward?

I'm driving a 200K 1992 saturn s-series with low seat and it's chemically fine, but it's not much in the car department and not very safe.  I was driving a 1989 sports car until it died a year ago and it was fine too.  Curiously my mom's Cirrus seems to be chemically fine, but the seat's too high.  RSXs are also chemically not bad but the seat's too high.

I'm truly baffled on what to do and it's taken over my life.  I know far too many car sales people at this point in time.  I've logged enough hours that I could start calling this a job.  Any pointers would be appreciated!!