You will def need to measure you legs to get a good idea of how 'short and fat' you are..probably not as bad as you think and there will be something out there to fit you. Are you fussy about what they are made of? Neoprene has a lot of give!
hi, i have english gaiter company leather gaiters they fir lovely and they do short wide and short x wide fittings, i have always had probs with chaps and gaiters until i found these.
Depends what you want, I like these - Kitt chaps - I have a pair of the yellow ones for hacking out in. THey are really comfy and have plenty of 'give'. They might not be 'smart' enough for what you want though.
I have the Shires leather half chaps for my chunky calfs they fit a treat and look very smart. I had the same problem with long leather riding boots but solved that with our local cobbler who adujusted them for me for a very small fee.