TOPIC: Source for jumbo non-countdown d20s?

I thought I'd take to the old interwebs to see if there are some big ol' d20s that are not of the spindown/countdown variety. I have not been able to find any in the same size TD uses. (I estimate they're in the 80mm range.) The largest I found is 34mm. That's definitely larger than a "standard" d20, but not what I would call huge.

Does anyone have a source for a fair d20 that can be easily read from several feet away? (I'm not interested in foam or inflatable d20s.)

The ones TD uses are 55mm made by Koplow.

Yes, they are spindown, BUT not like the WotC ones. When you get to 11, you flip it completely over to get to 10. So, they are "true" dice, having the opposite sides add up to 21. The number placement is the only difference.