Got rid of my Mk2 frame and upgraded to a Mk3 frame. I believe that the Mk2 is fatally flawed by its design that basically makes the bottom-bracket shell a wearable part, and who knows how long SJS will stock replacement shells (plus customers on the continent might not want to deal with the hassle of ordering post-Brexit).
Really happy with the Mk3 frame, it is just nicer to look at and touch than the Mk2 frame, and the presence of the seatstay splitter for a belt drive makes it more future-proof. Also nice to be able to fly with the bike without having to look for a fork spacer, because the Mk3 fork (at least the Thorn Bikepacking Fork) has a thru-axle.
Also, it is my understanding that Thorn no longer stocks a suitable disc-brake fork for the Thorn Nomad Mk2. The overall bike industry decided years ago already to reduce stock and quality of rim-brake components.