http://www.homepokertourney.com/poker-chip-racks.htm
Info on this page is still accurate, but where to buy racks and all of the new options aren't in this page.
There was a company called Casino Discount Supplies that used to sell the 66.7mm and 67.7mm racks. Then they disappeared completely (HPT still has their links on their site - funny).
It sounds like PGI sells racks branded with the Chipco logo now, which I'm assuming are made the same way as the originals. Their website quotes 67.1mm which falls in line with what the originals were sized as. They don't appear to sell the narrower racks that were closer to Paul-son's any more, so you may have to ask them to see if they still have some available. However, I'll list them here anyway.
Smallest to largest (based on what I have, measuring and experience):
- Paul-son (casino paulsons)
- Narrower Palm Gaming Int'l (same)
- 66.7mm (casino paulsons and BCC's and bud jones)
- Bud Jones type 1 (same + bud jones)
- Chipco/PGI Chipco (same + chipco ceramics, and some ASMs)
- 67.7mm (99.9999% of my ASMs and paulson home mold (ex. Avalons))
- Bud Jones type 2 (same)
- Cheapies and 68.7mm (dice chips, thicker ASMs, etc.)
I usually gravitate to the 66.7mm and 67.7mm racks for everything because they're made with that thicker lucite plastic that isn't as rigid that seems indestructable - similar to the original Paul-son racks and bud jones. They're all stamped with those measurements on the bottom.
Original chipcos were the most flexible racks I had ever seen. The plastic was actually flexible - almost rubbery and they had a milky opaque quality to them. They were great, but they didn't fit ASMs universally since the thickness of those can vary. That's why the 67.7mm racks ended up being the standard for those. Chipcos fit ceramics really well.
However, if you're after ones that are a bit narrower than the PGI Chipcos Apache sells the 66.7mm racks (most likely just like the originals) for $2.99:
https://www.apachepokerchips.com/product/chipco-poker-chip-rack/
Spinetti's says they have them and I believe them because they sport the original product numbers (ex. "crk039-66"). Casino Discount Supplies original product numbers match that.
https://spinettisgaming.com/collect...ay-clear-acrylic-for-39mm-chips-66-7mm-insert
But they're $4.50 a piece. However, you should be able to get either 66.7mm or 67.7mm racks from them. They may have taken over Casino Discount Supplies, which may explain things.
EDIT:
@LabMonkey set me straight on the differences between the old and new Chipco racks. PGI went with a simpler-to-manage material but use the same mold for the racks. That means they should be the same size as the originals but aren't as flexible.