B2B Portal - Control Visibility of items (1st - Not Listed, 2st - Listed & sellable, 3rd - Listed, but not Sellable)

I believe some of your clients may benefit from this feature and this will add a lot of value to our customers due to the nature of our business.

We have some items that require some extra forms to be filled in order to sell them.

We still want them to be displayed in our webstore to all of our customers, but only allow some customers that have sent the required forms to purchase them through the B2B portal.

Currently the B2B Portal will only allows you choose between Listed or Not listed. It would be beneficial to have a 3rd option Visible, but not sellable.