This link is broken, either the page no longer exists or there is some other issue like a typo.
(I've bought a few from this guy, he's cheaper than most of the supply houses)
This link is broken, either the page no longer exists or there is some other issue like a typo.http://www.patriot-supply.com/search_ne ... search=Go'
Also any local supply house will be able to sell you a generic or order the specific one for your boiler, usually, but $$$$ for the specific one. Don't be scared away from using a generic, as long as it's somewhat close, you'll be fine.