Joe, Ebay has an EDIROL UM-550 roland 5 IN/5 OUT USB MIDI Interface/MIDI Patcher for $190(USD). However, speaking from experience, it's better to buy a patcher with more connections than you actually need because in the long run you'll be glad you did.

Note: I use the EDIROL UM-880 in my studio and little by little every channel is in use.

P.S. The input/output routing connections you specify can be stored in one of five (UM-550), or eight (UM-880) memories.

Jeaux