Mark, you can buy Harrison blanks easily enough,good blanks but the cost is still astronomical.
I recently bought a fully built 2.1/4 TC rod from a certain well established popular company with what I call a "Skinny" handle, I.E nothing but a silly bit of Duplon on the butt. Crap in my opinion...I bought some corks from E-Bay, and put a full handle on the rod.... the same company sells the same rod with a full cork handle for £95.00, the skinny butt rod cost me £28.00, The corks cost £6.00 inc postage... total cost including Araldite... £38.00 give or take a few pence.....whos making the profit there, taking into account that everything I bought was retail as well...
I suppose that 40 years building everything from 4wt Fly rods to full blown Tarpon rods does help a bit though!