I'm in the ukWhere are you located? You can use autodoc and several to compair prices and makers. Most recognisable brand names are good.
If you pay too much you lose a little; if you pay too little you may likely lose everything! I would by an OEM one, that should last another 20 years!you can get Magneti Marelli for 35 pounds and Pierberg for 163. Both are known brands but thats a big price differnce. Peirburg are the original brand from what I understand but it just depends on how much you want to spend.