You might be in luck with the HTG...from their website:
http://www.mcmfamily.com/mcmillan-stocks-tactical-stock-list.php#m40a1THE HTG WILL ACCEPT THE FOLLOWING ACTIONS:
(if your action is not listed, please contact us and ask)
Bat - HR, VR
Big Horn - rear tang sits high on stock
Dakota 76 (action must be sent in for fitting, fees may apply)
Defiance - all models
Howa 1500
Interarms mk X
Mauser 98
Montana 1999
Nesika Bay - Remington clones
Remington - 40X, mod 7, 600, 660, 700, 721, 722, 788, XP 100
Ruger mk II (floor plate must be sent in for fitting)
Sako - AI, AII, AIII/L61R, AV, 591, 691, A7
Savage - all models - (93 E model must be sent in for fitting)
Shilen DGA
Stiller - All remington clones
Surgeon - all models
Winchester - mod 70, pre 64, SPR, PBR, TSR
Vanguards