Ferociousfish,
I purchased my filters from Tony De Branda. Rubber top and base mesh with paper filter see my photo. Think we are talking the same thing..
They come in a discout box of 10 or you can buy one.
With post it may be better to buy one or two.
Check out his advert. in Kit Car mag.
Let me know if you have trouble finding a mag. I will chase the add up when back home.
Alternatively I can deliver one to you if you are willing to put me up for a week at Noosa..
Bernie