Hi Jarrad, the best person to supply a bedknife for you is the engineer that sharpens your reel. He is also is the best person (that has the necessary tools and expertise) to remove the old bedknife from the soleplate, which is cast iron and can crack easily if mishandled.
Please don't attempt to remove it yourself.
The new soleplate has to be ground to suit the reel blade angle.The engineer also supplies the knifeblade screws
Some info on reel sharpening, click
HERE 
