I have not seen that one...
But what thy do have and you should look into is a grooming arm... I'm thinking that a suction cup on a mirror would not be enough to hold even my tiny little Pixie! She can be a real bugger when she is not in the mood... But with the Grooming Arm... It clamps down on a counter top or table and stays in place... and the can be adjustable to any hight. They are not real pricy and I am so thankful to have mine! its like having a fourth and fifth hand!
Check
www.petedge.com and under grooming just look at the Grooming Arms.. most, if not all come with the noose thingey.. or whatever you call it!
lol