I really don't know much about this sort of thing but I know someone who sells stationary who found a manufacturer on alibaba, I believe. I think, he said he looked for someone making/selling similar to what he wanted and contacted them to ask if they would make some for him to his spec. Might be an idea to try that?
Again I'm not sure but as long as you can provide a sketch with enough detail (number & type of buttons, placement of pockets, trim etc) you might not need a designer and I think the manufacturer makes the pattern. Bare in mind I'm no expert but have read a bit about this in the past because I'm curious.
I do know something about websites thought, they can be really fricken expensive, but it varies massively. I personally don't like sites that look... Cookie cutter, came from a website builder etc because they seem throw away (maybe because I know it's not hard to make one the 'proper way'). Same goes with not having your own domain name and using gmail/hotmail etc.
So in theory you could get a site for free/very cheap (diy) or few hundred pounds to a few thousand. That might not sound very helpful but honestly the variation is huge eg the company I work for is charging £££££ for a site that, on my own would only charge £££ for, but with just me you don't get the project manager, account manage and more experienced designer.
(Didn't mean to go on but I'm a web dev and dodgy websites are a bug bear for me)