Hey Vlad!
Why don't you use these guys?
https://pilotweb.nas.faa.gov/common/nat.html
You can input the lat/lon into the route manager in format: lon comma lat
So for 50N20W, -20,50
Though as they change daily, it may be best to just plan the route to a VOR or fix close to the west coast of Ireland, or near Halifax, and then add the tracks on the day.
Thanks again,
Jonathan