Yeah - I have one.
Not made by HD of course - I ain't made of money
But exactly the same concept and my SEEG fits with the King TP no problem.
I can confirm the thing does exactly what it says on the tin
The clear bubble zips onto the heavy duty base and the fan and filter housing are at the rear - plug in the detachable 12v power pack and off you go
There's a zippered adjuster at the front (at base of screen height) to regulate how big the bubble gets and how much air flows thru'
I have used it for probably 4 winters now - no problems except it's a PITA to put the bike in and out - but that's in a UK sized garage which is full of junk - you guys won't have any issues
Also you can put a low wattage tube heater under the bike and hook up your optimate battery tender too thus keeping everything sweet until Spring
I'll send a photo when the salt starts going down
Cheers
Dave