One of my Bridesmaid's at my Wedding in 1976 was a Spiers from Douglas.
She was aged 18 yrs old then.
I do not know if she will be from the same family that you are researching, and I do not know where she is now, but they were Manx.
Look at www.192.com OR the www.manxtelecom.com/directoryservices/phonebook/default.asp?
This might help you?
Regards,
Carol