Replacement drive gear

[Stevolution2019]

Hello all

My lovely Flashforge Creator has started to be a problem child....

Right hand heater element, or thermistor is playing up. Can't find a single heater block + Thermistor anywhere in the UK, except for:

https://technologyoutlet.co.uk/produ...ruder-assembly

But, that is the whole assembly which I don't need. Not trusting any more dodgy stuff off Ebay, so open to any direction...

My main issue however is my toothed feeder gears are stripped (or at least badly worn). I think lots of PETG has taken its toll.
But I cannot find that style of toothed feed gear anywhere.

All the ones I have found have a concave toothed section, and the one on a Flashforge extruder is straight.
Picture attached. Anyone know where to source these gears?

Thanks!