I need some feedback/advice

I recently purchased what I think is a Toyo-View Deluxe 45M, in addition to everything needed to take pictures.

My problem is that the rail I received it with the camera is a 150mm extension rail. I bought a second extension rail but you can't mount two extension rails to each other. This model's monorail has teeth so I haven't been able to find any standard rails on Ebay.

I'm not sure what to do from here. I have a complete and working camera but the rail is too short to do anything useful with. I can't even focus to infinity on a 150mm lens. Is there somewhere I can get a standard rail so I can start taking pictures or am I better off selling it? Parts for this model seem to be scarce. Here are some pictures for reference.

Thanks in advance for your help.