Finding Conventional loan with a private financing component

[James Bonsall]

I have a 10 unit building in Cincinnati, OH under contract for 244,000, with the seller assuming 20% of the financing interest only (at 6%) for one year.  My business partner and I want to find a bank or credit union that will lend counting the 20% seller financing component as the down payment. 

Any advice for how to go about this? 

(My partner has a note receivable that will come due early next year and I have an inheritance that will appear next year, which is why we want to wait a year to pay the 20%).