These are the only ones I've ever seen in quantity:
http://www.chiptalk.net/forum/member...vs-others.html
Very pricey.
I don't think there are any live casinos with 10c clay chips so generally they'll be collectible = expensive per chip and probably not available in racks.
HS = hotstamp. You'll be much better off getting a generic hotstamp denominated chip. If you wanted, you could get matching 25c and 50c (if you haven't already got these). And that way you can choose whatever colour you like. Here are your options:
ASM (pokerchips.com): Have a stock 10c hotstamp which could be used on solid A-Mold. Minimum order of 300 chips but someone may be willing to arrange a group-buy with the sale in January or you could get matching 25c and 50c to fill the order.
BCC (Blue Chip): Have a stock 10c hotstamp which could be used on the flame mold. Note that BCC will do hotstamping with whatever edgespots they allow (probably the best range publically available). So you could get, for instance, a solid 10c, a simple edge-spot 25c, slightly more complex edge-spot 50c which would be enough to fill out the minimum order (of 300 chips if I recall). BCC will also do a custom die (ie. create your own hotstamp) but it gets expensive if you want more than one die (many people get a non-denominated hotstamp one side of their chips and then a plain denomination on the other side to save on costs)
Otherwise you could buy blanks (from ASM in the January sale or T-Molds from HPC) and ask jsmithjr very nicely to help with a custom die. With T-molds you would have the advantage that there's no minimum so you could do just the 10c and work something else out for the 25c/50c.
Incidentally, maybe you just like having lots of denoms on the table but many will be redundant. Eg: if you have 10c and 50c then 25c is not really going to be very useful (there's no 0.25euro coin, is there?)
Hope that helps and remember, the search function is your friend.
Regards,
David