From my understanding those are similar to Bud Jones or what would now be GPI chips. Manufacturers like Abbiati also make chips like that. There was a recent group buy of Abbiati chips on here. I believe they were called the Park Place chips, similar to those Aria tournament chips.
I'm sure other can give more information on those than me. Don't know a whole lot about Bud Jones, GPI or Abbiati plastic chips.
But yes, you can buy chips that are similar to those.