when re-broadcasting the transaction through electrum I got the id 5180fe412ab78445a49726b8c5ed14ff5e7fa2d545c25df9bdb43a33d41ad6bb....... which is the exact same, without the -000. however I also cannot find it anywhere, every time a block come through i check and get the same 'not found' error.
it should appear right away (you don't need to wait for blocks). but maybe broadcasting from electrum didn't work. try pushing it on blockchain instead.
if that also doesn't work then just remove the unconfirmed transaction from core by running it with -zapwallettxes (
read this if you don't know how.) and wait for the btc to return to your wallet and resend it if needed.
Ok ill have to do the zapwallettxes, because I tried on blockchain.info and it said something about missing 1 input tx. I'm on it, and thank you again for your help
EDIT
THANK YOU SO MUCH FOR YOUR ASSISTANCE! the coins have been returned properly to his wallet and are safe and sound
in the end it was the zapwallettxes that did the trick