[Staowners] Support rubbers

[Alf Scotting]

Can anyone advise a source of supply for the support rubbers either side of the thermostat housing - I have just made a set using polyurethane and they are too hard as well as being too thick - My mistake on the thickness as I made the mould and it makes rubbers 1" thick - that means I have run out of slot on the stabiliser arms and they are under load without the 1/16" gauges in place. Does anyone know the correct thickness for a new rubber?
Thanks Alf Scotting