hey tim, have you asked the maintainer of the package through email or other means?
the maintainer's email can be found through the trusted users page[1][2] if all fails, you can submit a request for the package to be moved to the aur[3]. hope this helps, ~turret. [1]-https://archlinux.org/people/trusted-users/ [2]-for convenience, its ja...@gruber-linke.de [3]-no clue how to do this, or if its even possible. kinda just throwing it out here