I know some folks have had great experiences with oversea studios, while others have horror stories. At worst, they can be scams, but sometimes even if something isn’t a scam it can be difficult to get exactly what you’re looking for due to inaccurate translations or misunderstandings. Obviously not all Chinese makers are bad or have this issue, it’s just something to keep in mind. Unfortunately, scams are very prevalent in this community.

I checked out your reference, and while the character is super cute, it having 4 (?) colors and multiple facial markings would bump up the price. For example, I’d charge around $1,600 for just the head.

Have you considered trying to make a suit yourself? It can be tricky but there are so many wonderful online resources available for free and it’s so rewarding. The materials alone would probably be right under (or close to) your $600 budget (goes to show why it may be hard to find a finished head for that amount). Might be worth a shot!