Alternator Tensioner Broken! help

[s7oneyuk]

I have a 2002 S2 111S and the alternator tensioner has snapped (think this was a result of the top mounting bolt working loose and dissapearing). Ive done some digging around and have find a part number of A111E6238S. Does anyone here know if this would be a standard part, as fitted to other Rover K Series engines (part number YLX100140), would fit? I'll be needing to order the top bolt set too - so if anyone has any ideas on where i can obtain the parts i would be grateful!