The re-shell service is a difficult issue to address. For example, lets say a guy sends me a repaired product, I open it up & discover that some of the numbers on the drivers are removed. Now I inform the owner, that the driver is not an original driver... the owner say's, "No problem, go ahead with the re-shell." So I finish off th re-shell & send it back to the customer. Then the customer says the sound has changed.....
Who is liable? How much change are we talking about, because realistically the sound should change to a certain degree. Does the customer have a valid complaint?
Then there are the "used" CIEMs that folks do not know the real history behind the product. The product could be very abused, could have heavy mostture exposure, all the wires essentially decayed. So now this becomes a re-shell, and a repair job. Then the solid color shells.... a night mare to open, because when u r drilling them out, cutting them open etc... you really are not sure where the components are, wires, pcb, caps, resisitors.... alll a mystery.
Lots of issues, all addressed and resolved for 90$
I am not saying I would NEVER do it, but I am saying that it is not a simple task.