Hey, @Gloomrains !
One option for organising your store would be if you grouped these products using a product bundling app. This will allow you to group individual items so your customer can buy them as part of a bundle. Most product bundle apps will also allow you to offer unique discounts and give you a little extra functionality that you would typically get on the product page in the admin. There is a full range of bundling apps here, however, if you were looking for something specific then is app may be of use to you: Bundle Products and Discounts! This app will allow you to create a bundle with a single product & its all variants, gives you the facility to create a page on which you can list out all custom bundles of your store, as well as create a mix and match box (build your own box) which allows customers to add what they like to their own box.
Are you selling any other products on your site, or are you focusing solely on the DIY boxes?