What webber?

Im after a webber carb, for my 1980 1.5 golf gls, as the original is playing up and i want an upgrade, due to my lack of knowledge in this area i have no idea what one would fit. any help on this would be great  

direct replacement list http://www.webcon.co.uk/Downloads/2008%20Webcon%20replacement%20carburettor%20kits.pdf     its a weber 36 tlp