Not near leicester
I use Mifsuds who are in brixham near torquay in devon
but previously I've also used Fixation in Vauxhall, london
have a look in the back of amateur photographer - there must be somewhere more local to you
Price wise mifsuds are 35 quid for a crop body, and 65 for FF or 1.3 - IRRC fixation were slightly more
(both those are while you wait services - there are loads who can do it if you send the camera away)
Also note of caution: do not, under any circumstances, even is a 16 stone psychopath is pressing knife to your jugular, use jessops - I used them once before i knew any better and the camera came back with more cack on the sensor than when it went in.