This drug has been removed from the market in the U.S.
I imagine that the liability involved will prevent anyone from assisting you with obtaining this drug. It is sold for laboratory use only.
"The following drug products were withdrawn or removed from the market because such drug products or components of such drug products were found to be unsafe or not effective. The following drug products may not be compounded under the exemptions provided by section 503A(a) of the Federal Food, Drug, and Cosmetic Act:
Bithionol: All drug products containing bithionol."
Bithionol: All drug products containing bithionol. Bithionol,formerly marketed as an active ingredient in various topical drug products, was shown to be a potent photosensitizer with the potential to cause serious skin disorders. Approvals of the NDA's for bithionol drug products were withdrawn on October 24, 1967 (see the Federal Register of October 31, 1967 (32 FR 15046)).