In Radda there’s a shop selling “vintage style” pottery in gorgeous ice cream colours but I can’t for the life of me find their card. They also have a branch near the Bargello in Florence. In Radda it’s on the corner of Via Roma / Viale Giacomo Matteotti, the road that runs below the town walls, she sells vintage-style clothing too, lovely stuff. Otherwise, if you’re coming down here we have a fabulous treasure trove of vintage on the Chiusi / Chianciano road with plates, dinner services, vintage glassware galore. You can’t miss it, it’s opposite a big restaurant la Bussola.
Ciao, thank you very much for your local advice, this is the information that I couldn't find in internet. I will definitely visit the shop at Radda! I also plan visiting Pienza as well, so that I guess I can spend some time in Chianciano, too!
My heartfelt thanks!