Wow! rather you than me Dave. I think I would take the easy way out and buy an old one from e-bay or similar site, just to get the spare parts. Meanwhile, I've looked in my Music files and found the following three names and addresses who may be able to help:-

Repairs and Spare Parts Technics KN7000:
Tel: 01702 546195
Fax: 91702 546195
email: bill@wdgreenhill.com

Repairs and Spare Parts - Staffordshire Organ Services:
John Lunt
378 Walsall Road
Walsall WS6 6DN
Tel: 01922 412583
email: luntwilrose@aol.com

Graham Tilney, Technote
Steel Close
Eaton Socon
St. Neots
Cambs PE19 8TT
Te: 01480 470320

I realise that Technote no longer deal with Technics instruments, but they may still have some ex Technics engineers working for them who could help you.

Worth a try anyway - good luck!

Audrey