I've made a site that pulls data from the official Bandai Hobby Site to browse released Gunpla kits. This should make it easier to find kits by grade, series, and the release year.
The site should auto-update daily. If there are any bugs or missing information, please feel free to send me a reply or DM! I'm trying to keep this DB as automated as possible, so any kits that aren't part of the Bandai Hobby Site list aren't going to be included. When a new series or grade is released, though, I'll need to manually update the translations and image mappings.
Also on a side note, you can get the actual pdf of the instructions off their site by modifying their URL. Take this:
https://manual.bandai-hobby.net/menus/detail/2373
and modify it to this:
https://manual.bandai-hobby.net/pdf/2373.pdf
You now have the actual pdf file that you can download and interact with like any other pdf. Maybe a good feature for gunpla.fyi would be to directly link to these.