I have been searching for a bundle builder as well. I found this one https://apps.shopify.com/bundlebuilder?utm_campaign=installed&utm_content=contextual&utm_medium=shop... which is decent. It doesn't work for my products but might for yours.
You can experiment with the kit or bundle formats in the PickyStory app.
With bundles, products can be included or excluded with a click:
With kits, product quantity can be modified by shoppers but the overall number of line items is restricted: