I have an original Mercedes-Benz brand new NLA/NOS catalytic for 034 and 036 specific but I am located in Eastern Europe, I don’t think it’s worth shipping for someone outside EU. I am willing to let go as my personal 1992 500E Midnight Blue is without Cat as per datacard production.
I have had it for many years in my garage, not sure about the price, I have to check how much I purchased but it was expensive even back then.