I have a slightly lowered center stand that came off my 1993 R100R.
PO was short so they modified the stand about 1" from stock.

46-52-2-312-444 is the part number for the R bike but it should fit a GS (46-52-1-457-833) so long as you want it shorter.

I also have a set of offroad lowered GS pegs I will post