Since brother only provides .deb and rpm for its official printer drivers, there is an open source alternative for solus that works for several of their laser printers - I compiled it on Solus and it works fine with my brother laser printer. It should be considered for inclusion since we have nothing in the solus repo for brother printers right now. It is Open source, GPL2.
https://github.com/pdewacht/brlaser
from the description:
Most Brother printers support a standard printer language such as PCL or PostScript, but not all do. If you have a monochrome Brother laser printer (or multi-function device) and the other open source drivers don't work, this one might help.
It is known to support these printers:
Brother DCP-1510 series Brother DCP-7030 Brother DCP-7055 Brother DCP-7055W Brother DCP-7065DN Brother MFC-7360N