I have one Polish SRG-5 ration with BB date End of Sep 2020, the content you can read on the picture.
The price is 18 USD plus shipment. Together you can get a single meal SR-9 (pasta bolognese) with bb date 20 Dec 2019 for just $4.
If you are interested, I have a possibility to get a whole , sealed case (6 pcs) of SRG-5, the same batch for $90 plus shipment.
PM me if you are interested