These were sold on PCF a few months ago when TheChipRoom acquired all of the Secondary chips that Diamond Jacks had (from my knowledge). They were sold in sets and then you also had the option to buy racks of anything that you wanted. Below you can find the prices per set, prices per rack and more.

https://www.pokerchipforum.com/threads/diamond-jacks-secondary-and-roulette-chip-sale.103419/

(Picture credit to TheChipRoom)