Thanks Darren - i emailed SMD initially checked stock ( 1 in stock ) and asked where i could purchase one from as i didnt want to wait months for it to arrive - i duly rang one of the shops he recommended. When it came to actually ordering there was " a problem with the computer " and it wasnt in stock after all.
Ive since chased it up three times and was assured that they would ring me when it was in

. Never mind, i have just changed the tranny batteries ( again ) for now