To clarify Par is the maker of brand name Delestrogen, Par does not afaik make a generic.
Perrigo is the only source I know of for a generic (not counting compounding pharmacies).
I have not checked back, the last time I called Perrigo (I think that was March) their word was it *not* discontinued, however was backordered with expectation of solving the backorder by June / July .. i.e. now or real soon now.
I *have* had conflicting information, pharmacists at CVS told me Perrigo had discontinued the product and they'd told my endocrinologist the same thing and so my latest vial was Delestrogen.
Fortunately to me with insurance the cost is the same, however I'll go back to Perrigo when available.
UPDATE: I just spoke to c/s at Perrigo. The word from them was the same as before "june or july" and they continue to say it's not discontinued.
As a strategy, I was lucky enough to have had a clerical error on my doc's part result in receiving more vials than I need to get by and so I have several month's supply (for me that's just a couple of vials) cached which means for the foreseeable future I can ride out the shortages.