UK 9V 1A AC/DC POWER SUPPLY ADAPTER PLUG COMPATIBLE FOR ALESIS DM LITE DRUM KIT

I purchased this for my Alesis DM Lite after the cable on my power supply which came with the module became severed. I was thinking this would surely work considering it specifically says compatible with 'Alesis DM Lite'.Well lo and behold it isn't, cheers. The polarity in the plug is wrong. In the attached image the standard plug provided by Alesis is shown next to the one sold here by Yultek. It is clear to see that the polarity should be centre pin positive, but Yultek's model is centre pin negative.Sadly 1 star is the lowest I'm allowed to offer.

The correct product at a good price and quality