Support of Shimaoka Roman Numerals (widely used among conservatories in Japan for over 4 decades).

[ShikiSuen]

Today I made a font of such:
https://github.com/ShikiSuen/Yuzuri-Font
However, this is a slab serif font.

I am bad at doing normal serif fonts (like Times, etc.), wondering whether Campania devs are glad to make a derivative font (named as Campania-JP or Campania-Shimaoka) which uses current Campania design (roman numerals & arabic numbers).

P.S.: I am preparing to make a standard description of "what Shimaoka Numerals is" and send it to Unicode Consortium. The question is I don't know how and where to send.
P.P.S.: The VII is rarely used. All diminished chords are described as rootless dominants in Shimaoka Harmoniology.

[ShikiSuen]

Reference from Shimaoka’s textbook ISBN-13:‏ :978-4276102330
(Comprehensive Harmony: Applied Techniques, Analysis, and Fundamentals.)