Stu,
Hopefully you'll find a NOS Blackout, as I've never seen a perfect one. In fact most I've seen are pretty trashed and this would be a great seller. I'll offer up mine if you dont find a better one. May have too much damage for you, but it's the best one I've ever seen.
front-glass.jpg
rear-glass.jpg

Actually not sure if you could use that or not as it has been sealed. Looks like at some point early in life it got a couple scrapes, so someone did some quick touch ups then sealed it forever. Never seen this before, instead of Triple-Thick, they spread a sheet of mylar over it. That will never come off. Did the trick pretty well though, no further damage over the years,and it was a job well done as there are no bubbles or lifting anywhere, so hey, not bad.