Permissions in Admin based on Manufacturers?

I see that the Admin Settings mod allows you to specify categories for users. Does anything exist that would allow you to restrict admin access to products by a specific manufacturer?

I am wondering if it's possible to set up permissions so that manufacturers could enter their own products in admin.

I think it could work, security-wise, if permissions could be set up by manufacturer, so that a manufacturer would then just have permission to add/edit/delete products designated as their own.

Does anything like this exist? If not, do you think it is something that is possible to be programmed?

There's an Admin Profiles mod here that might work:

http://www.zen-cart.com/index.php?main_page=product_contrib_info&products_id=86

Thanks, Steve, for your response.

I already have the Admin Profiles installed and it doesn't have this capability.

I see that Admin Settings is another mod that allows you to designate specific categories - so that is closer! But still not what I need.

Any other thoughts?