Mullard make fine tubes. I like Telefunken best for my ear. However my hearing sucks!
For new tubes the Ei Gold Elite 12AX7EG with gold pins are going for about $11.00. I have read that this is a great tube for the money.
If you buy new Commie tubes be sure the seller is willing to take back noisy/microphonic tubes or screens them before selling.
Jim McShane is an honest seller who I've done business with and will do so again.