.jpg)
Duke Marketing says sales of TT3D: Closer to the Edge have been overwhelming at the Bike Show in Birmingham this week.
Peter Duke says some stock has been made available to sell despite the official release date being next Monday.
His company has been selling the documentary from its website as well as at the stall in Birmingham.
On Thursday evening, Mr Duke told Jason Roberts there had been a huge demand:
Athletics: Top-five for Cain at Swansea Half Marathon
Jamie Cringle 'a couple of steps closer in the right direction' after TT crash
Football: Castletown and 'Youthie' into Paul Henry Gold Cup final
Jade Burden 'so fired up' for rearranged title fight