Lenders for Des Moines, Iowa Market

Anyone here know any lender (small bank, CU, large bank, no hard lenders) who will lend in individual name less than 15% down for a secondary mortgage (non-primary residence)? 

We've found SunTrust (ticker symbol: STI, $30B+ publicly traded company) to be the only one so far who allows 15% down.

Any info would be helpful. We've 4 partners so we can leverage this concept. We own rentals in the Des Moines, Iowa area.

Thanks! - BH