For those able to produce their own steel shafts, this kit provides all the other boring tool components to save on some costs.  This kit includes:

1x Boring Head
1x Impact End
4x Set Screws

Bore will accommodate pipes of a 1.25-inch interior diameter or smaller

Included pieces are protected by a limited 2-year Warranty.  See Instruction Manual for instructions and warranty details.

DIY Shaft Instructions: HERE