Domestic Rcbo mk series 5

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Morning, Afternoon or Evening Ladies and Gentlemen!
Wondering if any of you fine people can help me out. Does anyone have, in their box of bits (that we all save, because they might come in handy one day!) Any RCBOs to fit an MK series 5 consumer unit. Just done up an annexe for my mum and fitted an electric shower, oven and water heater. Yes I can hear you all cry "why don't you change the consumer unit you lazy sod" but it's been boxed in and changing it is now going to be a pain in the arse. Will glady donate to anyones favourite pub fund who can help me out! Need a 40, 32 and 10 if possible. Thanks for your help look forward to the banter!

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