It hard to even offer a suggestion without knowing what the part looks like. Often, if one wants a part, you need to supply a drawing, with dimensions. That drawing can be a sketch, or a real drawing. Even a picture with a ruler next to the parts can be extremely helpful.
We have a saying here on HM, pictures or it doesn't exist. We're not trying to be difficult, but really, a picture is worth a thousand words. So far, we don't know size, material, tolerances, whether you need special things like chamfers or radii, or things like that. The more info you provide, the easier it is for someone to determine if they can help you, and estimate the cost.