I don't think you can substitute M-Type with anything on this earth. It is a very strong and particular flavor, and I know that at least TFA DK and TFA Flue Cured use some of it. M Type has to be used in very small amounts (preferably 0.5% or under), and your mix will need to steep for at least 1 month before it is vapeable.
i would advice to skip those recipes that use M Type, but if you want to make them...then you would need the stuff.
Here is a simple recipe to make with 2 of the flavors you already have. i took it from another thread on this forum. Very vapeable right away, better after a couple of weeks steeping:
DK Master Blend
4% DK Tobacco
4% Tobacco Blend (Tobacco Absolute/Em)