90 degree power transmission gearboxes?

Looking for a 90 degree gearbox with a female keyed shaft coupler on the input, but i am not having much luck. The closest things i have been able to find are on this diesel outboard that is for sale on alibaba:

https://preview.redd.it/5s1ul082bhhd1.png?width=442&format=png&auto=webp&s=c066b2504f58dce71bd354b1792fdd82429b1a8c

or this horizontal to vertical transmission on a Powersmart lawnmower:

https://preview.redd.it/4sra6bsbbhhd1.png?width=453&format=png&auto=webp&s=5f8eb954ebd68e633be8af4248f05e4ae8641032

Mcmaster stocks these below (they call "Right Angle Gearboxes"), which have a protruding shaft on the input and output, which would make it protrude from the existing shaft further. There are other vendors that make a similar product, but I am looking for one that would slip over an existing shaft, and i am not having any luck finding it.

https://preview.redd.it/30tkdmyobhhd1.png?width=302&format=png&auto=webp&s=2aba4806fa1132b9b6ac6630b845237950ea301a

Any idea what company makes components like this? Ideally looking for 3/4 or 1" keyed input shaft, withstands inputs of at least 5 HP, and 1:1 gear ratio