Looking for a replacement right angle head for a 1999 SNK RB-2NM with 5 degree indexing. Will buy a broken one as long as the attachment case is intact

I want since 2010~2015 RB6M Side swing univ attachment, Extention attachment, 90 angle attachment

I'm looking for a UNION # #Milling Attachments & Heads, but am open to other manufacturers and models.