provided I can establish that they are flip flop (as the MK1 is)
Mk1 was supplied in double-fixed or fixed-free more or less at random. I don't think anybody has ever died from screwing a single freewheel onto a fixed hub, so I wouldn't bother too much whether they are flip-flop or flip-flip :-)
To answer your question I have bought 4 of the MK2 and a some MK1's in the past, and the MK 2 all came as fixed/fixed. They look and feel really nice though, a fair bit nicer than the MK1's in my opinion (sturdier feel with fatter, better looking cones, smoother feeling bearings).
Mk1 was supplied in double-fixed or fixed-free more or less at random. I don't think anybody has ever died from screwing a single freewheel onto a fixed hub, so I wouldn't bother too much whether they are flip-flop or flip-flip :-)