Rear Number Plate Light Circuit-board

I believe this is a common fault with MG ZT saloons, mine is an 06 car that water gets in to the circuit board and rots the connections and the circuit board.

I have been quoted £57+vat and delivery for this from MG and Rimmers, I wondered if anyone knew where if anyplace would do them cheaper or if they had one they don't need that I could purchase from them?

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