You mat contact Henderson-Sharp at either of the following two addresses: 

USA: 
PO Box 1730
Champlain, NY
12919
518-420-3020
866-520-7371 (Toll-free)


Canada:
392 Dorval Avenue - #222
Dorval, QC
H9S 3H7
514-983-4184
866-520-7371 (Toll-free)