I have a perfectly good set.

They
are almost 40 years old still, but oddly enough they look to be in better shape now, than the 8 or 9 year old ones they replaced all those years ago!
But to answer your question, no I have not seen factory replacements in a long time. But have you actually checked a local parts store yet? Just wondering if there is a stock replacement from a traditional source still.
I'm replacing mine with braided to match the lower hoses to the axle.
Yours look to be in pretty good shape too. Are you replacing them because of some problem, or is it just time to do it?
Good luck with the search.
Paul