One bit of advice. If you're the least bit interested in "correct" style, the charlie would only be appropriate for after five wear. It's an evening jacket, not suited for the afternoon. But then, if you live the life of an iconoclast and revel in shocking the public who do care about such things, go for it. You'll cut a dashing figure and most people don't know the difference anymore anyway. Ha.

On the other hand, since you have time, you could probably score a fairly nice jacket from the local Goodwill store and pay a seamstress/tailor a few bucks to cut it down to an argyl style. It's really not a tough adjustment, and you'd have a nice jacket to wear for years to come.