Bob,

Lie-Nielsen sells tapered blade blanks for hollows and rounds.  I 
suspected you could probably make your blades from one of those.  Of 
course you would then need to pursue hardening and tempering.

Bill W.
Nottingham, PA
Woodworkers visit me at http://billwebber.galootcentral.com/

On 6/7/2019 12:47 AM, RH Hutchins wrote:
  Failing that, how