Mint shells are becoming few ad far between unfortunately. I have been looking for quite a while with not much luck.
They seem to be snapped up v.quickly. I too have been hankering after maxwells shell but with travel costs and time it is a bit of a stretch for me also. Very nice looking shell though none the less.
I was left in a similar situation to the op with a pretty rough shell that had been very cleverly Bodged to look good.
Infancy all the work that went into covering Rot it would have been just as easy/as much work to put it right properly!
Sorry about the essay!