Paul, Amersham markets a variety of leaded plastic items manufactured by Scotlabs. I don't know if any of the items could be modified for your investigator's needs. If not Amersham could probably give you a number for Scotlabs so that you could get their supplier of raw material. If you have trouble finding them let me know and I'll see what I can find. Dale E. Boyce dale@radpro.uchicago.edu