and yet if you look on ebay there seem to be mostly mk1 type forestocks for sale
I scour ebay daily. I did find a new Mk. 1 walnut forend from a source in New Mexico sometime back, and it's now proudly on one of my rifles. (But I have two more rifles that need this treatment.) Lately, all I can find on ebay in new walnut are Mk. 2 forends. Hence my question.

Sometimes it's hard to judge the type of wood from the pictures on ebay. I recently ordered a complete set of new wood from an ebay seller in Englandicon, but it turned out to be the birch/beech type. I can't really complain because it is new (old stock) wood, and it is what was pictured. But it's so clearly inferior I don't want to put it on my guns. (I have very nice walnut buttstocks on them already.)