Who do I contact to advertise on a popular car site

[Automotive site]

I have this car site that is quite popular with a genuine Alexa rank of lower than 50,000. I have a couple of private advertsiers (both are car insurance companies) that advertise in the sidebar, however, I am thinking about creating a banner at the very top of the site (above the site header) for another advertiser and possibly another one somewhere in the contant section (at the bototm of each article).

However, I am stumped as to what kind of companies I should contact. I have already successfully solicited 2 insurance advertisers, but I don't really have much of an idea what other type of companies that may want to advertise on the site. Should I go for more insurance avertsiers becaus ethey are obviously keen to advertise on automotive sites?

All ideas greatly appricated.

[C7Mike]

You could show Auto Injury Attorney ads for auto injury claims and settlements.

Another thought would be to place Google AdSense in that position and see what type of ads they show, which might give you some ideas.

[Automotive site]

The problem with auto injury ads is that there are so many law firms dealing with auto injury claims its hard to know which are the big ones.

[LifeinAsia]

I would have suggested car dealers, but who knows how long they're going to be around...

There are affiliate programs for:
- auto insurance
- auto parts/accessories
- car rentals
- car shopping comparison sites
- satellite radio
- car loans
etc.

You could join their programs or try to contact them directly.