I had found a toplink about a year and a half ago, as I mentioned in another post. It was a Cat-1 for $175. I moved to a different system, and no longer have the link saved. I searched over the last two evenings to see if I could find the web page, but to no avail. I do not know if they are no longer in business, or if I just had no luck locating them.
The cylinder was either Prince or Cross. But, again, I could not find that company...
After dinking with a cylinder, and new ball ends, and welding, I should have just bought the one off the web.