Dear Eric,

You should talk with specialized vendors which deliver reference biologics (innovators) for biosimilar drug development or biosimilar drug clinical phase. There are many company's which offer such services. Find some examples below:

https://evidentic.com/knowledge-base/for-biosimilar-developers/

http://www.bappharma.com/our-services/biosimilars/

https://www.pilatuscs.com/pilatus-clinical-services.html

https://www.protagenproteinservices.com/services/sourcing-of-reference-material

https://medizone.com/

https://www.emaspharma.com/clinical-trial-supply/

Best regards

Tomasz

Thank you very much! I'll begin with these, but now that I know what type of service to search for, I should begin to make some progress. Again, thank you very much for you help.