Its a different breed all together. My best luck, was querying all the local banks local to the area I wanted to buy. They know the land much better, and are willing to do some things others are not. They also know local appraisers and surveyors, which will give them the straight scoop, rather than cookie-cutter info.
Talk to the realtors in the area you want to buy, who represent land. They will know some people to talk to, and one step further, would be contacting a closing/title company, and see if they can give you any names, but that is a long shot.
When my ex and I had bought 10 acres on a mountain in VA last year, our loan came from the bank 10 miles away, and our realtor knew the Loan Officer/VP directly.