I was just about to point out that same thread.
Todd, as a quick-and-dirty solution you could track down a passive splitter box, the kind of thing you would use to run one signal into two amps, and run it 'backwards' so you're feeding two signals into one 1/4 line. I think DOD made a box like that but I'm nowhere near sure.
Congratulations on your new bass. I wanted that one badly but couldn't make it happen. You'll find this forum is a wonderful resource to answer the many questions you'll have as you explore what it can do.