More vendor payout flexibility

Can we get more Vendor payout flexibility and also the ability to override that vendors global payout per product

I would like to charge my vendors both a flat rate per order and a % of their sales. So lets say $0.30 per order and I get 13% cut from everything they sell as well.

Also in some cases I would like to be able to override the vendors normal rates for a specific product. So for certain products I may have come to an agreement with vendor instead of charging them 13% I charge them a flat $10 for a specific product.

CS-Cart has a lot of flexibility, but doesn’t appear to have much when it comes to vendor payouts.

I am using MV v3.