Hi Marisa,
I'm glad this was helpful! In general the same approach should work for any Stencil theme. The template names and JS modules may be slightly different, but they all use the same systems in BC to render the storefront.
Specifically, the JS module mappings in app.js (or equivalent file) and the approach for creating custom template files (https://developer.bigcommerce.com/stencil-docs/storefront-customization/custom-templates) should be pretty much the same. The webpack configurations are probably similar as well, but I haven't worked through this example on any third party themes so I'm not 100% sure.
Let me know how this works out for you! I'm excited to see what you build.