Best way to list products from another company?

Hi

I'm working with another company to cross promote both businesses.

The idea is that i list their products on my webshop with a contact name and phone number where the customer can purchase the goods.

My site has drop down menus so the customer can pick the part required and then they can pick the exact make/ model vehicle they have so I'm not restricted to specific categories.

Whats the best way to list the other companies products but not give the customer the option of purchasing on my shop site?

I'm not showing stock quantities - I was thinking of something like a showcase site for the other company originally but would really like to have all products listed together if possible.

Any suggestions?

Let me know if i havent explained it properly.

Thanks

Include in the description a link to the other site with explanation