No. 406 is prominently on the cover of the M35-theme issue of Ligne Z. This is the magazine of the French Ami-club, nummer 9 from 2009 is dedicated to the M35.
No. 406 and No. 18 are with the same owner who had them for sale recently, including a new engine. The ad was gone quickly, uncertain is if it was sold or the owner just retracted it. Here's the picture that was with the ad.