"Do these 3 entities still exist and do they all still make and sell chips under their respective names ??"

Yes and no.

The artwork for all 3, if going to US casinos is generated at Paul-Son in LV. It is generated on Paul-Son schematics. Under the PS logo they are noted "Bud Jones Style Chips" or "B&G style chips." If B&G style, the casino signs off on the art and it is sent to France and regenerated on B&G schematics, to be submitted to gaming.

All billing is paid to Paul-Son Gaming. PS is now the parent Co of all 3.
B&G artwork going to foreign casinos is generated in France.

BJ chips are made at the PS LV plant along with BJ dice and TK Specialty dice. PS chips and dice are made in Mexico. B&G chips are made in France.

Not being a big roulette collector, I'm not sure what you are calling "24 Lines" (scribed edge) style roulette chips" Scan?