........there are lots of places to get the AAR (air intake valve) "new"
problem is now that they are No longer manufactured, they went up in price and stock will eventually disappear.......
as for your second question
clean the brake area, clean the valve
heat up the bleeder valve a few times
spray some more pb blaster afterwards
using a 7mm wrench carefully twist it
if it breaks then it breaks.....you can "easy out" the bottom end of the valve
trick is DO NOT USE A SOCKET, USE A WRENCH



