Thanks, I had a look in Maplin but not much use - I didn't do a very good job of explaining myself to the guy in the shop and I don't really think he understood what I was after.
Anyway, in tragic related news, I just killed my small stone phaser 😢
For reasons too complicated to explain, I was using a dodgy homemade-looking 9v power supply that the bass player gave me, with a brand new boss-type to electro harmonix adaptor stuck on it. Turned it on and the LED lit up, then flickered and faded out to nothing and the sound signal went pfffffffftttt.... Now after a bit of tinkering I can get it to phase intermittently, but not properly and if you turn the dial it cuts to just a low, un-phased signal. And the LED doesn't work. Basically I think I cooked some of the insides.
I'm pretty sure this can't have been as simple as having the polarity the wrong way round, but must mean the adaptor is actually kicking out more than 9v. Can anyone confirm this? And can anyone tell me how to bring my phaser back to life?!! (i realize that's a bit of a long shot ☹ )
And has anyone ever used / heard of these Diago power supplies? I'm in need of a more reliable AC adaptor