Thank you for all your responses.
What we're planning to do is to purchase a CNC machine which allows us to do all the wordings, trademarks or anything you want on it. So we can provide standard products and customized ones.
What we want to know now is how big is this market, cause purchasing CNC machines and other costs are not cheap. So we want to know if we are able to cover all our costs. We'll give it a try even if it is a break-even situation.
BTW, we can also make RAS/RIS parts too.