Valve is bad, rubber is bad also. I don't want to go with a cheap ebay kit. Where can I buy the bosch kit?

"I replaced it with a new Bosch unit (DO NOT get the cheap eBay units for $25) that cost approx $50. Again, IT IS IMPERATIVE THAT YOU GET THE HIGHER QUALITY BOSCH UNIT. I got mine from my indy shop -- they have a good supply of them in stock. DO NOT SCRIMP when it comes to these parts. Spend the extra $15 -- in the long run it will be worth it."

Please help!