Handlebar stem with QR for storage

[CAMRAMan]

I've no idea if such a thing exists, but I was wondering if anyone sells a stem that can quickly be turned round so the bars don't take up as much width? Space in my shed is at a premium, so this would be helpful.

[tatanab]

N-Lock made them about 10 years ago.  Cannot tell if still available.  Byshulz do them https://byschulz.com/product/stem-twist-sds/?lang=en  stocked byrosebikes and hollandbikeshop and others.