Jeff, Lisa is correct only a knowledgeable agent from the area would be able to assist with land contracts. The public website for that area does not include land contracts. While both Lisa and I have access to the West Central Association of Realtors website, someone would have to physically show you homes.
I would like to suggest including lease with option to purchase in your search. To my knowledge, only homes that are completely paid off can have a land contract. The lease would give you more options. I would also like to suggest getting a Buyers Agent to reprisent your interests in this transaction. Sample forms are available on the website below.