Lenz makes a curved turnout with a 40.5" inner radius That is fully compatible with Atlas track.
You should be able to make it fit your application.
https://www.eurorailhobbies.co...O&stock=LE-45035
If that doesn't work I strongly recommend Brad at Signature Switch. He has done several specials for me that
I just could not get right when handlaying on my own. I'm fine with simple turnouts but curved crossovers,
crossings and complex trackage are Brad's strong points.