Job done! Managed to source a delphi brand suspension arm that fitted well, from auto doc, I gave them the vin and they came up with a list of oem parts, readily available and delivered in less than a week from Germany . Delphi brand is spoken highly of in Alpha Romeo forums. Took an hour of labour, wheels tracking, and back on the tarmac. Another Seamless job on a Delta. Total cost inclusive of labour and parts about £120.