Hi, hope someone can help me with this.

The negative centre pin on the powerjack of my 707 has somehow broken
off and disappeared!!!

Does anyone know where I can find a replacement powerjack

I found a mod to convert the machine to run off of batteries and it's
working perfectly like that, but obviously I still want to run it from
the mains as well, I've got the original wallwart transformer.

I'm in the the UK.

Thanks Cliff