Replacing toilet bowl, keeping cistern- diff cistern fitment

[Ben B]

I'm fitting a new toilet bowl to replace one that got too scaled up to flush properly. The new one is brand new, a spare that a family member had, but the main hole for the flushed water to end the bowl is too small for the outlet part of my cistern to fit into. Are these bits available from plumbing merchant's? The outlet from the cistern is about 65mm but the inlet hole in the toilet I'd like to fit it to is about 48mm.
Any ideas?

 

[Hugh Jaleak]

Either another pan or another cistern to suit whichever you wish to keep. You wont be able to put a siphon with a smaller dia tail in the cistern as it'll never seal, may even fall straight through the hole.... Cant make the hole in pan any bigger! You need to fit a pan/cistern as a matching pair.