There are quite a few dealer tools. I have found them in my searches for turnkeys. There are a few groups that offer turnkey sites for dealers. I myself am looking for an affiliate programs for automotive industry as have a few domains looking at developing. Probably can't help too much tweeking the script but if you have come across anything worthy of promoting let me know or make an offer on my domains.
vehiclelinks.com*-*This website is for sale!*-*vehiclelinks Resources and Information. vehicle links
faxcar.com*-*This website is for sale!*-*faxcar Resources and Information. (car fax) keywords parking gold.
http://www.canadianblack.com ( Canadian black) keywords
The rest of my auto domains relate to Australia.