You could expect an ergonomics 'expert' to come in but I don't think that will solve your problem. If the company calls someone in and they accomplish nothing, the company will have tried to do something, relinquished their liability and probably not have any more ideas even if they wanted to do more.
If that doesn't work, then what? Do you want your problem solved or do you just want to be at a company that takes a shot in the dark? You can probably find a company that will do that for you, there are plenty out there.
If you want to actually solve your problem though, you are going to have to confront it yourself from as many angles as possible. The first step is realizing there is a lot of trial and error and that few people really know what they are talking about. I've seen 'ergonomics' experts before, they will say to sit up straight and look forward. They don't have deep knowledge built up from trial and error with a understanding of underlying principles, they just have a certificate that gets the company off the hook.
As for your clothes, if no one makes clothes that fit you, then yes, maybe you should learn to sew.