I respectfully suggest you contact a company we here at BP use, they deliver worldwide for this application.
Company Name: Chemco International
Telephone No. + 44 (0)1236 606060
Facsimile No. + 44 (0)1236 606070
E-mail. chemcoint@aol.com
Contact Name: Manny Khorasani.
I am a specifying engineer, and have found these people to be very helpful in the past, especially with difficult to treat areas.
Regards,
Rembrandt.