Need power Supply for AS501PA Sound Bar

Back in 2006, I purchased an Optiplex GS620. It had a 17 inch monitor. With the monitor came a AS501PA Sound Bar. The package I purchased came with a monitor that has the ability to plug in the power supply into the back of the monitor. Last week I upgraded my monitor to the new 22 inch model (nice). Anyway, the new monitor does not have the ability to plug the sound bar into the back as the power source. When I purchased my 620, I also purchaced an Optiplex 520. This model also had the same sound bar, but this one had an external power supply that came with it, that plugs directly into the outlet, so I know they are available.

I have emailed, called, live chatted, called spare parts, etc. you name it, I have tried. Dell either will not, or can not sell me the external power supply for this sound bar. They claim that I need to purchase the entire unit in order to get the external power supply. Can anyone tell me if there is an alternative power supply that I can get to make my sound bar work with my new monitor? I'm willing to pay for one, I just need to find it. Any help would be great.