Topic

Thanks for the leads. The Ebay sphere shown from Germany is more or less the condition i'm after if I can't find new ones. I'll have a go at e-mailing some of the big sellers about some new spheres. I got my fronts from E-carparts but they sold out of rears long ago.

James, send me a PM with a price with postage for those small parts and I will do a Paypal. Sorry I didn't get back in touch sooner.

As far as I can tell the only difference between front & rear spheres is the conical shaped alloy bit at the bottom.
This can be swapped over.
To remove it I apply compressed air to the lower fluid chamber, fully inflating the diaphragm, then get a good grip of the alloy piece and pull it off using a twisting motion.
There is a rubber lip that externally grips around a lip on the top of the alloy piece.
To replace, With a twisting motion, I push the alloy piece into the rubber lip whist the lower diaphragm is still inflated.

For Trophy models the front and rear spheres share the same part number, which is different from the standard cars.
I don't know what other differences there are there are between Trophy spheres and standard ones but if there is no other difference between other than the alloy bit on the bottom, then perhaps using the above technique could be used to convert standard spheres to the trophy type.

Thanks for that Cobber.
I think I will pull off one of the rear spheres and try swapping the cone with one of my new fronts.
The worst that can happen is I will have to buy some used ones if it doesn't work out.
If it does work I'll hunt down a couple more new fronts.
Nothing ventured and all that!

I apply @ 150 psi of air pressure.

Beans for breakfast should do the trick then.