I have a little Hilco universal that only came with one of the attachments. I had a patent drawing that showed the other one so I built it from scratch (this was when I only had my Seneca Falls Star lathe, and very little experience).
I suspect you may have to do the same, it’ll be a fun journey if you can’t find original parts.
Here’s my Hilco.
I bought this little universal cutter grinder and can't find anything about it on the interwebs. Motor is a Dumore Type 2GM which I also can't locate. The machine is pretty simple so I don't think I really need any manuals or the like but it would be nice to know a little history. Hilco...
www.hobby-machinist.com
John