Graham I see the guy turned up on sat. with the shock absorber problem.
You might be interested to know Gaz shocks were looking for distributors for there range of shocks which is quite extensive, they do inserts and several different quality coilovers. Have a look on there website.
Gaz Shocks / shock absorbers, suspension struts and lowering kits The distibutor bit is towards bottom right of first page.