Crew Lists

According to my (Norwegian) grandfather's Naturalization papers, he immigrated to the US aboard the SS Umbria on 9 March 1903. This ship sailed from Liverpool to NY harbor. I have looked at all available pages of the passenger manifest at the Ellis Island website, but he is not there. I can only assume he was a member of the crew. I would like to verify this. However, the crew lists for this ship are housed in The Public Record Office in Kew (England). The cost to obtain a copy of these records is prohibitive for me (10 pounds just to get an estimate). LDS has some of these records, but not the one I need. Does anyone have any suggestions?