Hello Kayvan,
my 2 cents .... get a new reproduction lens from Bud's and glue it into your frame - and fine.
Yes, there's an inscription reading 2235 R on the inner side of the chrome bezel, not more. For sure no MB star or so. Can look this up for you tonight.
As to the repro lens, the early ones (i.e. the first ones on the market about 15-20 years ago or so) were of poor quality. I tend to believe that the current reproductions are much better, brighter red color (= correct) and especially better fit.
You can resilver (respray) your right reflector or get a new repro which is already resilvered.
As to an OEM right side taillight (all red type): fuggetaboutit.
Hard to come by, nearly impossible. A good used one perhaps but not a new one. All the "new ones" you can get are repros.
Right side taillight units are always in worse condition (compared to the left side lenses) due to the exhaust fumes and therefore much more rare than NOS left tail light assemblies.
My 2 cents, get a new (repro) lens from Bud's and put/fix/glue it in.
Good luck,
Achim
(allredtaillightcollector)