It's a pity Marshall have discontinued them
They're not discontinued as far as I'm aware - it seems to be an internet myth!
unfortunately, it is seemingly true. i've got that from a Marshall dealer, via a rep, and from the Marshall roadhouse site where Steve Dawson, designer of the Vintage Modern and Class 5, is an active member. they are doing a designer series with attractive ladies on the grille cloth, and then that is it. replaced by the Slash SL-5