Mine also broke. I simply filled the broken spring with epoxy resin and reassembled the it before it had gone off.
Seems to work fine now. I've no idea how long it will last but it's better than binning it!
Fiv
May 2012
Had the same problem, bought a Toolstation complete flexi, with collet etc, only had to skim the threads slightly on the main body to make it fit, as new collar was marginally smaller, cost about £15, but was worth it to still be able to use it. Wouldn't be without it.
The 'performance' spring cable has a small block on the end that the Toolstation didn't, and would probably make it a weak point if you tried to weld/solder it onto new one, but this works well!!
Diann
August 2011
just called their helpline number on the drill (0845 300 2577). Basically they say because it's a Performance Power product (i.e. at the really cheap end of B&Q products) then there are no parts available for it. I won't be throwing this in the skip as they suggest, I'll find some way of fixing it, but will never buy "Performance Products" junk again......
dave
July 2011
same problem i've got - flexible drive shaft is a spring and it's snapped.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix d.i.y tools.