| What's the point in that?
If I wanted a standard look I'd just core the exhausts as mentioned above. Be a waste buying termi's and then replacing the sleeves with standard ones (which I doubt would fit anyway!!).
I also doubt you'd pass your MOT with Termi's, they don't just look at the sleeve and think "oh they must be legal then". They do actually (or should do if they're doing their job right), test the db level output at a given rev reading.
I know they're doing such spot checks here on the island, having an e-legal stamp means nothing if it's not within the db limit. | 
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