Just curious - but why do you want this (rare) type ?
I personally prefer summersuits with long legs and short arms - simply because the legs are the ones that gets "cold" faster - and the free arms give you such a great freedom (feeling of at least...)
Apart from that - you have your legs in the water very often, and your arms very rare - so both the colder water as well as jellyfish would make long legs short arms practical too.
I am a bit coulored from my windsurf background maybe - I know - but I have a 5mm suit nowadays, with short arms - as it is so much more pleasant to ride with your arms free, and still just as warm (unless you are fumbling in the water all the time of course...) except for the wintertime
Use this particular "thick" suit in the late spring, where the water is still very cold, but the air is warm and very sunny.
But there are many geographical as well as personal differences, so I find it interesting to hear the reason for the choices
One could be water temperature versus air temperature, another could be burning jellyfish, a third if using bindings (where I can see a short legged long armed really make sense) - and there could be other differences ?
Curious what other think and likes ?
The last years, thin suits with long legs and long arms seem to be the manufacturers choice - so not as easy to find a good short legged long arm or short arm long legged WARM suit anymore
Of course - one can always cut a suit to fit
I've done that many times....
Just cut it a bit lower than where you want it to stop - as you can then "fold" the neoprene (and maybe even stitch it later), so it will stay put firmly without water getting into your suit.
If you cut it straight where you want it to stop - you might get a very cold and uncomfortable "leaky" suit
Peter