Source for new not NOS or new tube substitutions

Hello,

I am looking for newly produced, modern versions of the following, or new equivalents if no longer produced. I am not a big fan of NOS tubes, but if there are no new or new substitutes available, I guess I'd have no choice.

I do not happen to have a tube substitution book handy, so if any of you do (or if you're a guru who just knows off the top of your head), please let me know what the new equivalents of the following are:

35Z5GT
50A5
14A7
7A8
14B6

Many thanks in advance!!