Maybe place an ad in the BST section of this forum. There are quite a few amazing bloggers here ^^ You never know, you might get lucky ^^
Put out a press release. That's how lots of companies get the word out about their products. If you have some specific sites who you want to review your product, send the press release directly to them.
Use reviewme.com to find blogs offering those services, but always make sure you check their sites as they sometimes offer a cheaper option by going direct.
alot of top bloggers do not want to make money off there readers rather become good friend help eachother out share traffic i should know as a well known blogger
here is a very good tip: I once mentioned a well known blogger in my post and he stopped by to say "thank you". Then I emailed him. Most of them "google" their first a and last name at least once a month to see what bloggers say about them.