Hi Richard,
I’ve had one fitted to my ’38 Clubman Special frame for 10 years with absolutely no problems. Its just a bolt on universal job, they are about £20 on Ebay. It fits behind the gearbox on the left hand lower frame tube. When the stand is folded up, the end is just in front of the rear wheel spindle. It looks too far back but fitted here it is unobtrusive and the balance is perfect when the stand is in use. The frame tube needs roughing up to keep the clamp from twisting and I wirelocked the clamp bolts as initially they tended to work loose.
Good luck. 😉