Summary

I needed a standard size hacksaw and had all of the other parts already so it did not cost me anything.

Other items needed:-

30mm Hacksaw blade
8mm Steel shaft (340mm) x 2
{4 + 5}
4mm Bolt (25mm)
4mm Penny Washer
4mm Nyloc Nut
{3}
4mm Flange Bolt (16mm)
4mm Penny Washer
4mm Nyloc Nut
{2}
4mm Bolt (50mm)
4mm Penny Washer
4mm Threaded standoff or 4mm nut will do.
{1}
4mm Bolt (12 or 16mm){1}
4mm Full nut

Other printable items can be downloaded here:-
http://www.thingiverse.com/thing:2004093
They are:-
2 x Bar Tensioners
Blade Support
Blade Tensioner
Blade Tensioner 1'