I seem to recall someone on here rebuilding a set of CLS panels, he documented it pretty well. It can be done, and the parts are really cheap apparently.
If your not up for the task, you might search for a quad rebuilder (quads seem more common in europe) and see if they could rebuild them for you.
You likely will give up the advantages of whatever coating martin logan uses, whatever they use seems to work pretty well and last a very long time.
You can also try the shower method if they panels are just down and not totally out.