Thank you both for the replies.
I am pretty handy with a soldering iron, having had to work on my vintage 1979 Tabletop Asteroids and 1960's Pinball Machine.

But I get where you are coming from on keeping old modules up together and maintained, I do want to enjoy playing rather than tinkering.
I had the chance buying 11 pads in great condition which had been used with a DM-5 module, but was a little slow on the button, so missed out.
They would have been perfect, but hey ho, I am sure a nice set of pads will pop up soon.
Apart from Ebay and Gumtree, is there any other drum or music classified in the UK I should be looking for?
Thanks again.
Nick