Yes, there are a variety of angel investment sites, including http://www.go4funding.com/. I suggest, however, that you consider networking with local angels to learn how they are sourcing their deals, if there is room in their syndicate for you to join, etc. Generally speaking you'll be better off with a proper angel syndicate (or sourcing your own deals through networking if you have sufficient capital and cred) vs. an open list (where there's significantly more competition to drive up valuation).
Yes I would imagine so. There are many different sites for everything you could ever think of. You just really have to do some big deep to find out what you want or need. Eventually you will find what you need.