Google "Small Syringes", many sources there, example below, pulled from Google search.

http://www.researchsupply.net/syringes.html

 Depends on how large a syringe you need?

 I used to get used insulin syringes from my grand mother for building plastic scale models.

 She would break the needle off flush with the end of the syringe befor she gave thm to me.

 The thing that made me wild was that ex tax paying, retired diabetics had to fund their own needles but I.V drug users get them for free via the pharmaceutical benefits needle exchange program.

 That stinks!

 Cheers, Rob.