That IT Crowd - 'Let's say you've gone back in time' - T-Shirt

Last night's IT Crowd included a short piece with Roy wearing a very geeky T-shirt; the top line said 'Let's say you've gone back in time' - did you spot it? The T-Shirt is designed for time travellers and could be very useful in such a situation...


So far I have found this T-Shirt at a couple of US suppliers including wtfoodge and TopatoCo - anybody know of a UK stockist?