Free solution to converting PostScript type 1 font to ttf?
Yes. You can try FontForge.


  An outline font editor that lets you create [or edit] your own
  postscript, truetype,  [... ] fonts. Also lets you convert one
  format to another.


It may be a bit intimidating to install and use at first, but it’s very powerful and should be able to do the job. One way to install FontForge: use Homebrew (brew install fontforge)