[kaptain]

Does anyone know if the entire  “assembly” part number is stamped on the metal plates of the air springs?

We all need to start identifying the critical parts and share the info. I never thought we would find ourselves in a situation like this, the factory can’t provide basic information about these coaches.

JK

Yes, some numbers are stamped on the metal plates, but I don't know what these numbers are.
There are also white color paper labels affixed to the metal plates; these are the manufacturer part numbers.
And I guess these paper labels will fade over time due to heat, moisture, etc.

I recently received an order placed with Newell for front and rear, the date code on these airbags are 2019 and 2020, so I guess these parts have been sitting on the shelf for 3 or 2 years already. See the photos attached below.

I found there are some suppliers overseas that cost less than 1/2 Newell's price, but they don't have it in stock.

And, several months ago, I bought 4 pieces of 782NP04 (for drive axles) from Europe because Newell doesn't have them in stock. And that cost for a fraction of what Newell quoted me.