Looking for a portfolio lender

[Riggies B tang]

Hello 
I have a proposition to buy my business partner's share. My partner and I own a portfolio of 6 duplexes in Alvin Texas. about 30 miles south of Houston. My partner is going through a divorce and court order to liquidate all asset, including these properties that we both own more than 8 years. I am looking for a private loan to buy my partner's share, perhaps a portfolio loan if that make sense. These properties are fully rented at approximately $550 to $650 a unit which is under market rate. There's management company already in place.  Thank you for the help or the referral.