Generic Inverter Question

[scooby-doo]

Hi Peeps

This is just a generic Inverter question...over the past couple of weeks I have been having quite a few inverter transformer faults...the question is, Is there a secret supplier of these transformers or do you just buy the complete inverter

I have been ok upto now and used old transformers from other boards but I have a Sharp 32" Aquos...(model number ripped off) that has a transformers gone..PSU/Inverter=RUNTKA396WJN1...and Im struggling to find one
It also hurts to think if I did manage to find a PSU for £50ish then in theory I would be paying the £50 for 1 transformer.

Thanks for any help as always