>>7097629I think you're going to be stuck watching eBay for the Mattel versions. Not only are the Rockin Action figures insanely expensive now, they're also fragile because the plastic the joints were made from was super-cheap and started fracturing with age. You can buy 3D-printed replacement parts for those on Shapeways but you'd have to sand and paint them, which not everyone is willing to do. Unfortunately those were the only two lines that made Bass and they're different scales.
There's some model kit options for Protoman but they're pretty lousy. The good third option for him is pic related, but it only scales with the Megaman from the same line(whose facesculpt is pretty lousy). It's Takara's "Plug In Battle Model RM-02 DX Blues".
If you do want any of the Japanese options, you'll have to watch
Yahoo.jp auctions and use a middleman service like Buyee. They probably won't show up with a search in roman characters, so you'll have to find the katakana conversion of the character's Japanese name, if applicable, and copy it into the search bar. For example, for Rockman, search
>ロックマンFor Blues, search
>ブルースFor Forte, search
>フォルテ"EXE" is エグゼ, so you can tag that onto the end of those.
And if you come up empty-handed, bookmark the search results and keep checking every day or so. Speaking from experience, persistence is key.