I bought my Wheel Chock from
http://www.wheeldock.com/ several years ago, and I really love the thing. Amazingly enough, I don't think the price has gone up at all since I bought mine back in 2011. And if you buy direct from them you get free shipping, which helps a lot! I did not check to see if they offer a discount to CVOHarley members, but it's always worth asking. As it is, the price for the chock for my RGU is $225 delivered, which given the quality of construction and design, is worth it and then some!
The Wheel Chock isn't your standard chocking system as you can see below from the photos:

The top photo shows the rear part of the chock in the "up" or locked position, and the bottom phot shows it as down for loading or unloading. As you can see, it has holes for semi-permanent or permanent mounting to the floor of a trailer or other structure. I have used it in my motorcycle trailer many times and it works flawlessly.
But as you can also see, it works very nicely without any floor mounting whatsoever:

I leave the jiffy stand down when the bike is in the chock, but you wouldn't need to. Then when it's time to get the bike out of the chock, it comes in handy to have it down, as you'll want to lean the bike a little to the left after you lower the chock and until you can get seated on your bike to roll it off the chock. That just gives you a little more peace of mind, although it would take a lot to tip the bike, even with the chock in the "unlocked" position. Speaking of that, it is virtually effortless to roll a bike onto or off of the chock. It requires little or no extra effort, and that is nice.
WheelDock makes their chocks to fit your specific bike, both for radius and width of tire, so you get a fit that is snug as a bug in a rug. Their videos are very helpful and really sold me on their product. They can be found at:
http://www.wheeldock.com/page/home/resources/wheel-chock-information/wheel-chock-videosWatch the top left video and I think you'll be convinced!
Hope this helps any of you out there who may be looking for a help when cleaning or working on the bike, or when trailering it!