How to make required companion products

[bcohen0]

Hi, can someone tell me how to do this either within Virtuemart or with any extension, please? Virtuemart 3.4.2 right now.

The issue is that there are several "main" products which we sell for different prices, but require that you select the same necessary companion component which has several options. We want to force the user to select the companion product before placing in cart. The companion product has 6 different options which have different prices.

Here is what we did which isn't working well: Using multivariants we can make a dropdown which shows the options, and the FULL PRICE of the product if that option is selected.
This works for the user but doesn't work for us because when the prices changes on the companion product options we have to change a gazillion prices all over the main products.

Can anyone point me to a solution for this problem, which would allow us to apply these companion products to various parents, and change the companion prices in just ONE place?

Thanks

[Studio 42]

You have this plugin https://shop.st42.fr/en/products/extra-product.htm but it dont check for required.
I can modify the plugin, to verify the products associations with some extra works.

[bcohen0]

 That's fantastic, if it could be made to be required!

I need to see what it looks like in action, but the demo link isn't functioning. Is there a way for me to see it in action? Or download a review copy or something?

Thanks

[Studio 42]

Oups, it's because i have set a demo for a customer to use (UK) domain plugin that was not existing.
Try again here https://pro.st42.fr/en/demo/extra-product/extra-product-demo.html