I really wouldn't waste your time on the EL 127 mythology , yes they my be front loading but they movements were so wrong and who wants to go through nonsense of removing the bezel , and then swapping the movement over, just so they can say they can Whoop Woooo.
Angus may have this 1950 and it has a very good looking and correct movement.
Or try DSN and here
They might not be available but its worth a try as they are very good watches , a Modded EL will be an expensive watch and if the rumours of a new 127 are true an unwise investment .
Trusty is a bit over priced given the movement .
Lays could tied you over and let you get your fix until the new one appears, and you may well be wearing it for a while
Hope this helps, good luck
ST4