Hawk:
I don't know who made the stock for the SSG 3000 US model (attached photo). I found a picture of the stock that McMillan makes for SSG 3000 on their site (attached). They do not look the same as mine. They have none in stock- and said 10-month wait. I have also attached pics from the the British version of the SSG 3000 owner's manual, and you can see it's pretty clear that McMillan did make the stock for the British market because it's so similar to the aftermarket stock they show on their site. You can see that there are significant differences between the US and GB versions of the SSG 3000 stock- if McMillan made the US version, why not just produce the stock they were already making for aftermarket and GB versions?
I think I will keep this rifle for a long time- and I am lucky that I got one before they stoped importing around 2015- price has gone up a lot. I like the classic look of the stocks that I posted pics of in my original post, so I am researching replacing the US version stock that came with mine. Is your stock the "SSG rifle stock earlier..." that I posted in original post?
I saw GRS and contacted them. Because of custom nature of their rifles, not available left handed version. More I research this, I realize I have a bigger problem than I thought. I'm right handed- but shoot rifle left handed (how the hell did that happen?) Never noticed till I went to buy a nice stock.
I will look at the source you mentioned.