I thought I would post to this thread since there were a few who indicated they would be interested in one if the price were lower.
According to an email I got from Graeme, they have (2) Artic Silver demo tops in California they are selling for $3,000 each. If you have an Artic Silver car, this might interest you.
In addition, the quote I got for a new one, color matched to my car was just under $4k plus shipping. That's quite a bit lower than the price I see advertised. It was a limited time price directly from Graeme, but it may still be available.
In the end, I decided against getting one, however, the prices above were much better than I expected to get when I started looking so I thought I would pass the info along if others are still interested. Graeme's email address is
graemet@zeintec.com and is also listed on the Zeintec website.