Theme advice needed

Hi folks,

I am looking for some advice. I have a meeting with a possible client this weekend to discuss their upcoming project.
What they are looking for is a website for retailers to browse products and view by supplier. SO I guess each supplier should have a “profile page” and a list of what products they sell. Also, there should be a registration option for retailers too.
He also wants them to be able to video chat with suppliers if they are online and available.
It seems to me that a type of “social network” theme would work here but obviously not something that looks juvenile, like the old Bebo. sorry Bebo 🙂

Can anyone recommend a suitable theme that could fulfil some or all of these requirements? Premium or free, it doesnt matter as I will cost it into the job accordingly.

Regards,
Niall.