This is a time when a real estate professional is worth their weight in gold!
Mobile/manufactured home sales and mortgage loans are a niche market in the Phoenix area with only a fraction of agents and lenders doing business in the arena.
If you don't have an agent of your own (which I highly recommend) you might pose your question to the Seller's agent. One of our jobs as agents is to identify possibilities of financing when we list a property for sale.
If neither you nor the Seller have an agent, I suggest the person "here" does some investigation to locate agents. The old fashioned way is best, driving the neighborhood and general vicinity in search of "for sale" signs. Call them. Agents will be the best source of information in finding a suitable lender.