Is there anywhere that I could get keynotes because I miss placed my set of keys for a 76 vette I tried several dealers even the big one In  Newhampshire with no luck

Key Codes? Not sure of your query,  but maybe a good vehicle locksmith could read your ignition switch and get the tumbler reading. A master key type of sorts. Just guessing. But, I have a complete column for a 76 in brown with keys, in case it's of any consolation to you.

You could also get a new ignition with a new set of keys. It's relevant relatively easy to change out. You just need a steering wheel puller and a lock ring removal tool which are both readily available. 

You only had one set of keys?

73shark probably has the best solution.  Trying to get a key made for it sounds expensive to me.

Years and years ago a buddy had a '60 Chev 4 door sedan.  The ignition key for my '68 Chevelle would work in his car and his key would work in mine.  Thankfully the door lock keys were different so I never had to worry about him taking my car without my knowing about it.  ;-)