Do you mean a Euro Lock for a 35mm door. If so loads here. http://trulypvcsupplies.com/yale-an...o_Deq9ICFUSeGwodp_sHHQ#143=95&160=565&187=515
Hoppe, but there isn't a slim version?, but if you take a little time you can get a neat tight finish, bolt through handles do help to add strength... WOI
The casing for the euro cylinder, sashlock of sorts. Problem is many are made for 45mm firedoors and so require extra effort in fitting them neatly, as Working On It states. The bolt through handles would be very useful after chopping out most of the 35mm!