Got that exact pair in black I bought mine back in july from Biker World
http://www.bikersworld.net/ the ones in coleshill. I know for a fact that they also go the the n.e.c show aswell. Mine are a size 38 which is quite slim fitting, I tried on a set of beriks in a 38 and they were larger around the legs and your bum.
Hope this helps.
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