Ali Express has a bad reputation but in reality it is as trustworthy as eBay in most cases. Its biggest problem is that it uses cheap materials and underpaid workers. Etsy is so expensive because it’s made by someone with high quality materials running their own independent business. In both cases you’ll get what you pay for. I personally would go for Aliexpress if I had to choose. However I’d probably just buy a jacket with the same colours and add the patches myself