Bert, I've seen those pots for sale at our local shows here, too. They're always too expensive for me, since I have a handyman (engineer) husband. We have a pot drilling frenzy about twice a year and just drill holes in regular pots or the ones from the big box stores with the slits in them.
At first he made me stand by and run the hose over the pot so it wouldn't overheat and crack but now I just lay the pots in a big bowl of water to keep them cool. It keeps the dust down, too. I can drill holes to my heart's content.
If there is an IKEA store near you, they have some really nice 4in. clay pots at a good price (can't remember what I paid last time but I bought a dozen). They are a nice brown color, not terracotta, but I really like the look of them.