Armitage Shanks Freeflow 4 toilet spares

[spinnerc41]

Our 1970's Armitage Shanks toilet is not working properly, on the side of the siphon it has "freeflow4". When working properly when you flush the waste in the bowl gets sucked away, then water appears around the bowl and rinses. This is not happening the bowl fills with water up to the rim and then flows away. Any ideas where to get spares or a suitable replacement?

TIA

 

[Lou]

Hello there

Did you manage to find any parts? If so, where did you get them?