Be very careful, sellers are not subject to the same regulations as lenders. Even if you find one the deal may fall apart years from now. I frequently get calls from buyers that lost a ton because the deal did not work out like they thought it would. You are assuming the seller is in a better position than you are, often a very big mistake. Usually the reason a buyer seeks owner provided financing is because the buyer does not qualify for a traditional loan. Underwriting guidelines protect the buyer more than they do the lender. If you work around not qualifying for a traditional mortgage the risk on your side increases a lot.
Thanks for sharing Jim!