On my holiday in France I did manage to find some yarn shops although most of them are also cloths shops. We were staying in the Charente region of France
We found a Phildar shop in Cognac so I bought some 100% bamboo yarn and some 75% cotton 25% seacell to try. I'm always interested to see if the know manufacturers are producing yarns using new fibres. Most do have a bamboo yarn now but I haven't seen much in the way of seacell mix yarns.
There was also a Phildar shop in the Intermarche Hyper market at Chalais. We also found two yarn shops in Riberac (in the Dordogne region). One shop was also a fabric, patchwork and tapestry shop with Katia yarns. The other shop (which was also a cloths shop) sold Berger de France, some Katia and another French brand I hadn't seen before called Cheval Blanc. They did a cotton bamboo mix so I got some balls of this as well.
When I get around to knitting samples I will post some pictures.