As you can see from the pics these are right beside the road (A701) between the M74 junction and the village. They are marked on the OS map. You can legitimately park by the fence at the entrance of the small road 175 yards before and on the opposite side of the road from the stones. From there you can walk along the pavement and across to the stones. In summer long grass can partially obscure the stones - see pics.
A three-stone row running NNE-SSW beside the A701 between Moffat and J15 of the M74.
The stones look smaller than the dimensions in Canmore; the tallest is more like 1m than the 1.7m quoted. Possibly the ground level has increased following road improvements.
Too cloudy to see if the stones were aligned on anything.