Hi Ty,
I can't help you with any info on these except that I had one here in excellent condition and nobody would buy it. Ended up a mate of mine bought it for his collection of Vortexes but the interest from the buying public was zero. I had a number of bog standard old Powertorques for sale and everyone that looked at the Vortex just turned their backs on it. I wonder if the sales figures of the new ones were similar. Times may have been different back then but it was obvious to me that people were put off by the fact they had no idea what was under all the plastic.