Good morning Charlie - Carlos is correct - they're all from the HIT Casinos Group -
the key to location is on the outer rim of the chips:
blue = Park Casino, Nova Gorica, Slovenia
orange = Perla Casino, Nova Gorica, Slovenia
green = Kransjska Gora Casino, Kransjska Gora, Slovenia
yellow = Kristal Casino, Istriana, Croatia (closed in 2014)
red = Mond Casino, Goricah, Slovenia
I'm afraid I don't have any extras - sorry about that - Happy New Year!