I picked up another dc01 for £1 off ebay,a fixed head the same as my good one.
So that's a total of 3 dc01 I now own.
I fitted the brush bar in to my good machine and it's now back in action.
The brush bar looks to be a different design in the way the end caps fix to the shaft (deeper inset bearings and caps) so it might be better.
My old brush bar had thin end caps with dust seals,this is where long hair can get in and melt the plastic end caps.
All so bought a very good condition henry, about a year old to replace my old henry.
The new one is two speed so that's probably the part which will let it down in the future.
Still looking for a cheap Dyson fan heater and airblade.