If anyones interested you can actually make your own using fan clips, literally just made these snipping and bending a pair of 120mm fan clips.
Not fancy at all but they work, planning on plopping this on the AM4 kit when it appears, the fan "floats" using the clips, totally accidental but possibly a plus?
Idea came about when I saw lots of people putting the noctua fans on an I noticed the hook holes on the side of the cooler, just like for fan clips, I tried using un modded clips. no dice, snipped an bended an, well here you go.
Could easily not bend the leg so much to allow mounting of the slim fan. currently its 60mm high, obviously about 10mm less using a slim, I say about as the clips would hook in over the top so give or take a few mm at most but if you flush mount it I doubt it would be a problem.
Just a dirty little hack mod for us without printers