'Oliver!' Costumes Wanted

Hi Everybody, I'm trying to find out if anybody knows of a set of costumes for Lionel Bart's 'Oliver!' that is available for hire. I work for a high school who is doing a production in March, and we are particularly looking for a large set of workhouse/orphanage clothes for our chorus. Does anybody know of any theatre companies/costume companies or other who have a set for hire? Thanks Gideon