Sorry mate, yes but keeping it for a spare (just in case) : Why dont you look for a re-furb kit ! Or if you havent got one at all, I read in a recent magazine that Heritage are doing a good repro, worth a shot
http://www.vwheritage.com/vw_spares_Fuel-Pump-Type4-engine-1-7-2-0-72-83-Mechanical-021127025A_act_shop.product_pID_122350734_lang_EN_country_GB.htm?crumbStartPage=5&crumbStartRow=61