WOW, am I surprised! I did a search too.
Being a trouble shooter I did look for alternatives - which you are not looking for, BUT, depending on the situation "might" work:
There are several black glossy and one Simi-gloss (Seymour 20-1679 PBE Professional Trim Spray Paint, Semi-Gloss Black) on amazon.
. . . THEN there are FLAT Clear lacquer sprays that "might" work over the gloss.
Not what you want but "could" be worth a try.