Any tyre dealer that sells Michelin can get the XZLs but they may not know it as the XZLs are not in some of the older catalogues. Get the dealer to call Michelin and usually all is sorted. These tyres have been available for quite a few years.
The last time I checked - about 3 years ago - I was quoted between $650 to $800 a tyre so the price you have been quoted is probably about right.
Garry

