This the sort of thing you are looking for?
Basic Japanese quality, for JIS square taper bottom bracket, steel 52/42 rings, alloy cranks....typical sort of thing from a "10 speed" from the 70's or 80's.
Shouldn't be too hard to find on
ebay, or if you have a local recycling place?
Or send me a PM if you want the one pictured with it's matching LH crank.