2 ways to do it it; do what Tony said below..including get on reo trans.com, reomac.com.
The second way is to find an agent through yor brokerage who has reo's. Form a temporary relationship wherein you help them with their reo's. Strike a deal wherein every other REO, you are listed as primary agent. Mnay reo agents are so bogged down they can't return calls, take descent photos etc...some may be open to you working under them for a bit. Then after a year you will have a portfolio of experience wherein you can site to the asset managers and say look, I already have reo's from xyz...I would like more.
Remember; with Reo's you will need to make sure you have some cash flow. You will be putting the utilities in your name. You will get reimbursed, but it may not always be timely. It is more like a property managing. You have to make sure the property is maintained and secure while vacant, pay for utilities and do a lot of administrative work.
My 2 friends are doing a workshop soon on how to get these REO's.One of them is a realtor, the other was in charge of wholesale lending, as well as asset management for two large banks. Email me if you would like infor on that.