mine is an F model, where the kickstand what mounted at the rear of the cradle. like yours.
here some pics of the original mount.
note how it's not a flat piece of steel but a curved profile which gives it more lateral stability. also you'll see how the frame tubing is reinforced where the mount is attached. this reinforcement is still present on your frame.
so if you want to replace the mount in the same position on your frame, make sure you attach it to this reinforced part.
next, here's where i attached my new mount. this is more forward on the cradle, close to the position of the K models. the engine hanger is also here, helping to add stability.
here's the mount that i made up, after it's welded on. i think if you click the picture it might open bigger.
you need to do some planning to get all the angles right: length wise, so that the stand swivels up and down to the correct positions. and side wise, so that the bike leans at the proper angle.
for fine-tuning, i ran a tap into the stand and put a screw through it, with which i can adjust the position that the stand rests at in the "up" position.
the mount is relatively long to distribute weight over a larger area. also, if you look at it from the front or back (sorry, no pic) it's a Y shape made up from 2 steel plates that are hugging the frame tube.
a bit like this:
O - frame tube
Y - mount
that's because the tube is not reinforced here, i added this to create enough stability.
and here's a slightly crappy picture with the spring attached.
hope this makes it a bit clear. i did this mod 3 years ago, the bike's been constantly used since an even with full camping luggage, the side stand's been strong enough for anything.
lastly, here's my original post describing this but it actually has much less detail:
http://forums.sohc4.net/index.php/topic,134863.msg1907761.html#msg1907761
