There are many adjustable-lenth kickstands out there, but I haven't used any. I do have plenty of good experience with the Pletcher Two-leg Kickstand with my tandem bikes. These keep the bike straight upright, great for loaded bikes.
13.5 inches ground to bottom of chain stays of my tandem. You may require a shim if you choose the Pletscher. BTW the Pletscher is way too short for the Vendetta.I can't seem to get a measurement from the top of the Pletcher Two Leg Kickstand to the ground.