Matching 60's red brick for extension

I wonder if anyone can help me. I have a semi-detached house that was built in the mid 60's and we are just about to start a garage conversion. I'm having trouble matching the original brick type. Ive been told that they are most likely Butterly bricks, but using the following database i cant seem to find a good match http://www.cmb.ie/brick%2Ddatabase/

Here are a few pictures of the exact brick. From the pictures you can see they are frogged. There are a few houses on the road that have been extended but they have all used different bricks, close but not the same as the original.





Thanks.