i used some old military officer's gimping i had a yard or so of it so that's what i decided to use ...i got the blank from an amish hat company in lancaster pennsylvania i got several blanks from them before they do the final steam shaping for the boxy amish hats i paid i think $15 or17 per blank....bolman hats in adamstown, pa...i used to do a lot of hats for the theatre and for rev. war re-enactors when i lived next to valley forge