I am not sure how things have changed in the last few years in your state, but the best recommendation here in Florida is to sign up for the BPO class that most real estate school are offering. It's less than $200 and very comprehensive info is given to completing BPO's to conform to the current market and standards.
I don't want to seem like a spammer because I am NOT and don't like spam myself. So I'll throw this out there. A few years ago a business partner and I wrote an ebook about short sales and sold quite a bit. Point is, we also created a short BPO report that we included with the ebook and it included a large list of BPO contacts we made throughout some time. Although some of the info may be a few years dated, I can't imagine all of these companies not working BPO's. I have been giving away this report for free as a thanks for joining my blog plus all the good value info I offer in the blog. I'm sending it off to anyone that has followed the blog for real estate agents I post on daily. Since I don't want this to be taken as spam, I would be glad to send it your way whether you follow my blog or not. :) Shoot me an email! :))