Add virtuemart conditional discounts

Hi, I am in search of experienced Virtuemart developer who either edit the virtuemart1 plugin for virtuemart 3 OR Add the same functionality to Virtuemart 3. Scenario is that, We have child or related products in Main product, which needs to be added in cart with Main product at discount price. If customer try to remove main product from cart the Main product will also automatically remove OR the prices of child/related product will change to original price rather then discount price. So main product must be there to achieve discount on child/related products. Like Product A (main), Product B and C (child/related products) Product A added and Product B and C also added with it. Product B and C original price $10 but when added with Product A it will become $7 if customer delete Product A from cart then Product B and C will revert back to $10 or these products will also remove auto with warning that" Product A should be added to achieve discount." It does not matted either you use any extension, discount or price override. But the discount or override price for product B and C are different so we cannot apply single value on all related/child products.