I think the K2/K3 used Kappa panniers, which I've got some pics of if required as that's what's on mine. The later Suzuki ones were made by Suzuki (I think).
didn't know the racks on the earlier 1000's were different but if you need any measurements let me know and I will go around mine with a tape, mines a K2 52 reg.
The earlier panniers were Kappa K40's I think. They did some V Strom specific ones where the plate at the top was in Suzuki colours and had V strom on them.that's the ones I use.
don't know if all that rambling will help much.
Cheers
Mick.