I know this is an old thread but I have a 2200 with a bad speaker protection relay and wonder if the afore mentioned:

Lenbrook UK Ltd.
2, Old Wolverton Road
Old Wolverton
Milton Keynes MK12 5NP
UK

Tel: 01908 319360
Fax: 01908 322752
e-mail: info@lenbrook.co.uk

is still in business with the relays?