Add CMS collection in an e-commerce CMS product collection

Hi all! I am trying to find a work around for the fact we are unable to add custom fields in bulk to a an e-commerce product CMS collection. Is there a way to nest a regular CMS collection in a e-commerce CMS collection?

My thought is that if I import a csv with all the “custom fields” to a regular CMS collection and use that within the e-commerce collection list-item that would solve the issue for the bulk update issue.

Any thoughts? Direction?

I appreciate any feedback.