I just replaced the original stand on my '81 R65, it was the same as yours, only thing that is different with the stands, is that the later bikes center stands don't have a rubber plug in the end of the left tube, to act as an up stop .
The bikes that came from the factory with the later stand, have a piece of sheet metal welded to the frame tube with a rubber stop attached to it .
Get the upgraded stand, it makes a world of difference, if I knew what a difference the new stand made, I would have replaced the original decades ago !!!!!!!!!!!
The center stand shown in the eBay auction ad, will work fine on your bike, it's the newer style .