Here are two ebuilds (amd64 and x86) for Brother's brscan3 driver. I use them to scan with a Brother MFC-7440N printer/scanner/fax. Probably not a really clean way to do it, but at least, one can install the software via portage with them ;-) Reproducible: Always
Created attachment 263023 [details] ebuild for the amd64 version of brscan3
Created attachment 263025 [details] ebuild for the x86 version of brscan3
It is not necessary to make two different ebuilds. You can use arch conditionals in SRC_URI, see http://devmanual.gentoo.org/ebuild-writing/variables/index.html
Created attachment 266693 [details] Unified ebuild for amd64 and x86
I think this is definitely superseded by the Brother overlay and can thus be closed for sure.