RM20 or RM25?
Catalogues are online, I always thought the RM ones are rather nice, nicer than CV 7 and such, but not really sure where I got it from.)
https://www.oldschoolracing.ch/archiv/araya/
https://web.archive.org/web/20190629122659/https://www.araya-kk.co.jp/rim/catalog.html