Valve damping washers - where to buy?

rico

There was a thread some time ago about rubber valve damping washers but I can't for the life of me find it. 

I need some to suit 12ax7 and el84 valves - where is best to get some?

Philtre

See http://www.thefretboard.co.uk/discussion/105583/valve-rattle-damper-rings-anywhere-in-uk-that-sells-them

I got them from https://mcru.co.uk/product/valve-dampening-rings/

rico

Many thanks!