I have been looking for the HV20 Wide angle lens. The 190 US$ price tag of the Canon WD-H43 0.7x turned me away (http://www.amazon.com).
I went on ebay to look for cheaper price and stumbled on the Tokina 0.45x lense. It is a lense made by Sakar. It comes from Japan: http://sakar.com
At 43 US$ including shipping I was sold.
I got the lense today and did the following quick test. At 1st glance the lense look fantastic and the footage done with appear flawless. I noticed focus hunting when zoomed to 10x... but I can leave with that for the price.
I have posted a quick test footage on vimeo:
Tought I would share this with you.