http://store.tapeworks.com/1080.aspx
i just found these guys from the states, they sell rear number boards aswell, a bit pricey tho, i've emailed them about shipping costs, so lets wait and see what they come back with.
i just wish i was convident enough to make some templates and then bumble signs would make them for a fraction of the cost, i doubt they would charge more than £15 to £20 for a pair, as far as the front boards go, when i first saw them over a year ago i was very tempted but then i saw a picture of them on a bike and i didn't like it so much, i'll try and see if i can find the picture for you, it might help you make up your mind, i also think theyre a bit pricey also.

found it
