where's a good place (UK) to get an exchange ECU

Well, it turns out the ECU on my Audi 1.9TDi (1974) is faulty. Power fall off is the symptom, above 3k rpm. Its not the usual MAF sensor problem.
Any guidance on where/how much a replacement is.
Cheers... Rob.
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www.bba-reman.com
www.carelect.demon.co.uk

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