HPI Rear Body Post Extensions or Long Body posts

[Quantum2+2]

Hi
does anyone know where I can get some of the HPI body post extensions without buying a hpi spares pack which contains parts I dont need. I have a AE TC3 and need to either get some long body posts(rear) or some of the HPI body post extensions At my local clubs no-one runs HPI cars anymore so has anyone got a spare set of the extensions they dont want or can anyone tell me where I could get them without buying stuff I dont want? I am at a bit of a loss due to in the UK the longest posts avalable to me still arnt long enough.
Thanks
Paul:smoker2: