Custom curved turnouts have made difficult jobs work out for me many times. The short answer is to shut down your computer and disregard your track planning systems.
I have laid out many junctures of right of ways with total disregard to any fixed available turnouts.
I fix the track as to how I need it to run then get some brown wrapping paper and a big brown crayon and trace the location. I then roll it up and send it to Brad. Brad spends some time on his keyboard and creates a CAD which he sends me. I in turn email it to FedEx which prints it out 1:1.
Then I position it in place over my staged track to confirm fit. Then Brad gets the go ahead to make the plan.
Brad can build anything. Period. He has no limits. For example I needed a 76" radius curved turnout throat that went straight at a #5 frog. Below, lower left.
We also needed a diverging track to come off a 72" radius curve, cross an east bound track then join a west bound track all in one piece. Shown below.
On another occasion a 4 track staging yard needed a ladder track to fully develop in under 90 degrees of 72" radius. This meant that the points had to be positioned to less than 1/2" from the frog. Brad made a custom arrangement of half turnouts which were much like the early Roco switches. Shown below.
There was a need for an asymmetrical wye where a sharp curve had to leave a wide radius curve to serve a coal ramp. Again below:
One of Brad's specialties is a curved crossing on a curve. My most recent peninsula required crossing a curved outside track to gain connection with an inside curved track. which required a double curved diamond joining a asymmetrical wye turnout with both curves on a spiral easement.
As far as curved turnouts go, Brad can make anything. He works outside the box.