@Kevin Reid
I actually did this earlier this year. We purchased a new house, and are currently renting out our other house. We have a trusted realtor we have used multiple times now, and below are a few things we did to accomplish our goal
-Asked our realtor to setup email notification for houses on the MLS that fit our criteria, like price, bed/bath, and area in town
-Scanned Realtor.com, Zillow, and Craigslist regularly
-Went driving on weekends and evenings after work to look at houses in the areas we were interested in, and then sent direct mail to the home owners
-Called and visited websites of Banks to see if they had any foreclosures, as well as local property managers
Unfortunately we did not think to look at home path.com, which I now kinda wish we had. I don’t know how active you want to be, but I think Zillow and Realtor may show you foreclosures, you may be able to lookup the owners information and call them to see if they are still able to sell the property. I tried that once, however that particular call was not well received.
Hope everything works out for you!