[T.Smith]

I spoke to the owner pretty recently at Spearhead Militaria. They are just waiting to get more inventory.

Also, here is a quick comparison of my What Price Glory P37 BD and Spearhead Militaria M37 BD

Spearhead (SHM) on the Left. What Price Glory (WPG) on the Right.

Colour:
WPG is obviously not Canadian, so and it does not dye well. I've tried. It's still brown...
SHM is very close to some originals I've handed. Good enough for me, as there'll always be variation in dying wool.

Build Quality:
WPG is meh. Buttons need re-inforcing, buttonhole stiching sucks, and look at that SLEEVE! It looks like an Axe wound. Having said that, this tunic is a few years old and still going strong.
SHM seems good. There are obvious shortcuts though.

Apparent Authenticity (NOTE: I don't have an original to go side by side right now. I'll be comparing shortly and will update):
WPG seem to fit well, be of a good weight, and seems very passable for a British P37 BD.
SPH seems to be cut well, but of thinner material and the epaulette (or whatever they are called) are not dimensioned properly (uniform width, rather than tapering from the shoulder). The buttons are wrong as well (I will be replacing them).