I don’t know, but my understanding is that with the factory producing higher capacity units that it doesn’t make sense for the aftermarket to support or supply or mod them anymore.
Probably still possible. I can’t see why not.
Well, I was thinking of getting the 32GB Midnite Manager @work, but 32GB doesn't go very far these days, so unless they have something of similar capacity in the works I was thinking of slotting a 256GB in its place...
TBH, for the £100 asking price compared to the £46 for the non-flash MM model, I would expect the extra to include the sort of 512GB drive I could easily buy for £50.