funding my next deal??

I own a duplex with about $70,000 equity. Cash flow on it is $600 monthly with a interest rate 5.75%. I just sold a commercial property that I own free and clear on contract for deed which gives me another $1000 month cash flow.  What's the best option to finance another investment property without a large down payment or refinancing the duplex.  Any companies out there that will give credit against the duplex equity or finance 100%of the deal? my credit score is 780 -800.