Supporting Private Sector engagement in fortification/development of nutritional products?

We are looking for donor support specifically in initiatives to encourage the private sector in fortification, but also in innovations and developments (including but not limited to the development of nutritional products like local Plumpy).

Which donors have strategies/mandates or funding opportunities specifically geared towards funding opportunities with the private sector? These can be multilateral, bilaterals, or even the private sector itself.

Any and all advice appreciated!