I bought my set of MXT's one year ago and am quite pleased with them.  I have
found that 48,000 miles is about all I can get from any set of Michelins,
wish that I could get more.
Yes, the Michelin web site does not list these tires.  I bought mine at my
local NTB.  I went in to the store to get whatever tire would fit.  After
explaining to the young service technician my vehicle's needs, he got on the
phone and found these tires for me.  Surprising because I thought that good
service was dead.  He explained that they cannot sell them to anyone except
Vanagon owners.  I do not know if this statement is true, but it makes for an
interesting story.
Anyway, my advice is to get them, you will not regret it.

Good luck and safe driving,

Dennis Lockwood
91 Vanagon Carat
Original Owner