What is this part ?

I have an a727 transmission that I am mounting a B&M shifter to it..ordering the cable and mounting hardware but I seem to be missing a part ?

I believe it goes into the shift lever hole and B&M calles it a Chrysler lever ? I need to buy a yoke off a 727 so I can mount my driveshaft...is this another part that I can have pulled off ?

What should I expect to pay for these at a salvage yard ?

Thanks
ian.