Materials are easily obtained at hardware stores. Hobby transformers can be purchased at hobby shops, thrift stores, classified ads, etc.
Music Wire can be purchased at many websites and at music stores. Piano wire and/or Guitar wire would be other names of the wire you need.
An 18 inch length of .025 Music Wire should cost around $4.00 to $5.00. If you correctly locate the turning arrow shaft supports near to the where the Burn Wire Form will be an 18 inch length will be more than enough.
An alternative is to make one yourself.
The parts are readily available, inexpensive, mostly, and making one is very easy.
With a length of .025 Music Wire, BRASS nuts, washers & bolts, a piece of 1 X 4 wood and a used Hobby Transformer you can make a turkey fletching Feather Burner for a pittance.