Stax ESL loudspeakers servicing

Hi everybody,
Despite this is my first post, I am following this great place since many years.
I am a fan of ESL speakers, especially Stax loudspeakers.
Recently, after many years of search, I've found a pair of the mighty Stax ESL 8x (the big ones) in working condition.
I am very excited about this unique opportunity but on the other side I am fully aware of the cells fragility.
I know that sooner or later I may face problems with these beautiful speakers.
Before to take a commitment, I looked around and around on the web to find somebody able to regenerate Stax cells (not now, for the future) but with no luck.
Any experience/hint related to servicing these speakers from the forumers?
Many many thanks in advance,
Alberto