NOTE: I don't see these pieces in the SCARM library and have contacted Mixy.
I sent him what information I could glean from RR-Track about the missing pieces and he said they'll be in the next update to SCARM. In the meantime, if you need them, you can use the "Snip Off" option in SCARM to cut a full O42 curve or copy the "orange" pieces from the attached file. As you can see, I added the switch and full curves to show the Makeup piece completes the circle and the Parallel piece makes a parallel siding. FWIW, if you want to cut your own, the Properties dialog in RR-Track shows the length of the pieces are:
Full Curve - 16.49" (same as SCARM)
Makeup piece - 4.62" (I got this one exact)
Parallel piece - 11.38" (I got close at 11.39")