We advise caution when sourcing your uniform. Just about any dressmaker will tell you that they can easily make it for you, but most dressmakers have limited experience in producing military-style uniforms.
The attention to detail needed for a uniform is greater than that required for your average civilian suit, which is something that typically only becomes apparent after you've spent money on fabric and labour to produce it. Please make sure your tailor understands the level of detail that will be taken into account when the CO inspects your uniform.
It's all-too-easy to end up with a cringeworthy approximation of a uniform instead of something that makes you, your ship and your fleet look good. The product you want to end up with is a professional garment we can all be proud of, not a cheesy, ill-fitting Halloween costume.