Share 'A2 card printing in London'

Sorry this isn't quite 'zine related, but I am hoping to put out a 12" LP in the near future and am looking to handmake the covers. For one of these parts I will need to have an image copied onto A2 card (or something around the size of a standard LP cover). Ideally it would be 250gsm, but could make do with something a little flimsier. Unfortunately all the places in London, UK, I find that prin…