As far as my concern there is no as such company which can give you direct leads..so,I think you can go for Fundoodata's listing option..which will help you for your branding prospect and as the site is being used used by all the CXO level and middle level management so you may get good leads by knowing among them..

There are quite a few companies which do lead generation for companies. You can talk to companies which are into Direct Marketing. You can search on the net as you have not specified which city or country you are looking for to do sales lead. Only thing is that all the companies do sales lead for some specific industries so that you have to check out

Do any one know of a company which generates sales leads