Marcos Maniacs

I've been getting a vibration at about 3000 rpm and its been narrowed down
to the prop shaft.  I brought it in to check on the balance but was told
that the problem was that the front knuckle/spline is too worn where it
slides through the oil seal onto the transmission output shaft.  Does anyone
know where I can get a new front spline?  It's a 20 tooth spline and the
outer diameter 1 3/8 inches.

 

Thanks for the help,

 

Danny