Me neither - could they be "Krauser knock-offs"?
The general issue with the R65s is that a number of bags can work - the tricky part is whether one can get the frames/brackets that bolt onto the bike to which the bags attach to fit. The R65 has a lower seat/toprail height, slightly shorter swingarm length, and the lower bolt hole near the passenger footpegs where a bolt is usually used to secure the lower front of the brackets/frames is oriented 90 degrees rotated from that on the R80/R100 of the same vintage. I think that some of the earlier R75 parts may fit with modifications of varying degrees, but I am unfamiliar with the "KG" bags of which you speak.