I did not do the research myself. I read an article about customs officers in the Family Tree Magazine and a name and address was given offering research. Send a S.A.E. with details of your ancestors in the Customs (not excise) and cheque for £3 per name to:-
Mrs. June Underwood
174A Wendover Road
Weston Turville
Bucks
HP22 5TG.

She may not answer straight away because she has received so many enquiries from magazine readers.

Janet.