They were for sale from Jarod, but I bought them a few years ago.
There is a chance I MIGHT consider selling them, but they sure are fun. 150's make great little ski planes. Come to think of it he asked for right of first refusal so he would get first dibs. I can answer a lot of questions for you about them in general.
Wow, that is the first tube gear I have ever heard of on skis. I see the cables are mounted quite differently than a flat spring gear. Perhaps a call to Wipaire is in order as they own the Federal ski rights. They may be able to provide the drawings and copy of the STC which I bought for I think $150, but will be a much different set of drawings for that setup.
Nose ski's sold alone are as uncommon in the US as lower taxes, or Sasquatch I looked for mine for 4 years or so, hence the reluctance to part with it.
It may well be possible to borrow one and have a few clones made by a reputable shop using the parts unavailable clause of the regulations. This may be somewhat easier in Canada.