Approach New York PR firms to barter services

We are a media production company looking to find a Pr firm in the New York area that will trade services with us. We are specifically looking to offer them our web design skills in exchange for their Pr services. We would also be willing to offer them any other service that we perform. We specialize in: graphic design(photo,web,graphic), audio production Video production And Artist management Our website is being revamped a bit but can be found by searching for maincoursemedia. We basically are looking for a provider to search for eligible Pr firms that would even consider an offer like this, and contact them with this offer... We are not looking for someone to send out a mass email list..this needs to be individual in order to have a shot. Also, we are not looking for anyone to contact the largest most known companies because they probably wont accept the offer at all. We will help create a text that you can use as a starting point for contacting each company. We are looking for multiple companies to accept this offer as well because we have many different projects. Payment will be made per each company that accepts our offer...I would like to keep it around $400-$500 per offer accepted. PLEASE INCLUDE THE WORD "PAD THAI" IN ALL BIDS AND PM'S TO ENSURE THAT YOU HAVE READ THE ENTIRE POST.