There are several methods you can use:

ClickBank marketplace
PDC marketplace
Facebook
Forums
Place your affiliate URL on your sales page

membershipmillionaire.com (not my site) also allows you to post your affiliate program if your a silver member - that's worked quite well for me.

The key is to use ALL of the above methods any others you come across and together you will build a list of partners in no time.

Of course your offer/pitch needs to be appealing