i bought a used hanger9 pts p51 and it has the FSOne solo simulator and i just found there is no USB interface cable with it. Is there anyway to make this work . I called a hobby shop earlier and they said you cant buy them .

You need a new hobby shop. There are USB cables all over E-Bay that will plug in to your transmitter. There was a version sold that came with just the software and you had to buy your own cable and controller. But like I said, you can find them all over the internet.
Do a search on E-Bay in Toys and Hobbies -> Radio Control for USB.

Unless you can get a USB cable with the FSone doggle it aint gonna work. The doggle is there to piracy protect the software. When I start up my FSone program and the USB is not plugged in the program gives me a warning and then shuts down. It needs to "see" the doggle cable to run. You may contact Hanger9 and explain you situation. They may sell you one, probably not. If they sold the USB cable then the program would be easy to copy and sell.