Missing the frog half of several early Roco turnouts I did what I learned to do 8 years ago. Call Brad Strong @801.884.6354. This guy has bailed me out 50 or 60 times with odd ball stuff. He will make anything. I informed him of my problem and he sent these:
He makes them in both LH and RH. Very slight but measurable difference.
The tie at the seam is undercut so you can use full length rail joiners.
I supplied my own code .157" rail.
I'll bring them to the Strasburg PA 2 rail show this Saturday a.m. at the firehouse.