Not likely, unless the part was a 1 off, 3D print.
Just not enough demand to set up molds or dies.
For the ramp gate you are looking for at the top of the center loop back, you should be able to use an old gate, and switch,
or maybe even wire in an opto.
The other end are a few small threaded strips, to hold down ball cover, which isnt needed in home play, but can be hand made with a Tap and die set, files/grinding, cutting disks carefully.
In that regard, I can send you a better photo, but the help you need, might come from others that can offer ideas on mounting, or choice of switch mechs, MRS switches.....