I would not be shocked if some are for sale at D Day.
I am speculating based on the following.
1) They have announced that First Strike rounds are usable this year.
2) Tiberius will be attending D day this year for the first time in a few years.
3) The last time FSR where for sale at D day was when the T-4 was comeing out and I got one there at that time prior to the widespread release.