Did you ask them if you could buy the Sako hunter and inlet it for the m70? I did this a couple of years ago and it worked out very well. Just a thought.
I have this on a FN SPR action...same as an M70. Has a bit of a raised comb, cheekpiece, palm swell and cast-off. Very comfortable sock.
McM also has the McM Hunter which is basically the same stock as the Sako Hunter.
McM Hunter top (tan)
Sako Hunter bottom