I stumbled upon this seller (www.thephotonshop.co.uk) some time ago when I was searching for the best EU offer for CR123A.
There are cheaper cells available online but none with an equally good reputation within the EU I am aware of (if anybody knows an EU-based place where I can get better batteries for less, please post it!)
So far I have ordered 40 batteries in total (£13.95 for 10 TI CR123A shipped) which arrived after 3-4 days (a very different experience compared to the usual shipping times from China or HK and no worries about customs and taxes).
It's not really a budget shop and there are mainly Fenix lights along with some accessories but the free shipping is nice and the prices are competitive compared with other EU-sellers.
I have pre-ordered the HL30 and Charlie who runs this place is keeping me updated with regular mails about the status of my order instead of letting me just wait.
So personally I can recommend TPS.
Anybody else have experience with this shop?
edit: The place is run by a guy named Rob, Charlie is a staff member.