There are a couple in England.

Stanley casinos had a 25p and 50p coin inlay chip

http://www.geocities.com/jdskinner123/scchiplist.html

Pleasurama, a casino group taken over by Grosvenor, used to have a 50p, and it is still in use in some Grosvenor Casinos. I picked this one up in their Great Yarmouth casino - it's not far from me, so may be able to get more!

http://www.geocities.com/jdskinner123/plchiplist.html

The links are to my website where you can find more details of these chips and the scan below shows these particular chips. I think there are some more, but can't remember from where just at the moment! Fortunately we still have a number of casinos who use coin and foil centre chips.

Jason