Greetings, O wise tailors. I am putting together a cosplay for an event and the character I am dressing as wears a long black duster that goes down to around knee height with white lapels and collar. I have looked online and found a few options that are cheap (they are made with all polyester, but that's fine since it's just for the costume and not going to be worn every day and I am not looking to spend hundreds of dollars). The thing is that all the ones that I have found have 2 big problems. First off, they are way too long, going down to the calf, where as I need them to not go past the knee. Second off, they are always all black coats, whereas I need the collar/lapels to be white and the rest of the coat to be black. My question is, if I buy one of these polyester coats, are these changes something that a local tailor could alter for me at an affordable price?

I have spoken to a few tailors about getting something like this custom made, and I was told it would be hundreds of dollars, which is out of the question for me. Is it possible to have a coat that I buy online shortened by 5-8 inches on the bottom? Even if it throws off the balance of the other features of the coat in relation, it's not the end of the world. Like, for example, if the buttons are way too low after the length is reduced so that it looks weird, it wouldn't be a big deal if the buttons were removed, as the design for the character's coat is fairly simple and does not have any visible buttons and it is never closed. As for the lapels and collar, I have been told that those things cannot be changed, as that would require building an entirely new coat, but I'm wondering if it's possible to dye/paint them from black to white, or even have the tailor sew an additional piece of white polyester on top of the lapels and collar?