We don’t make any of the items here. We sell items made by Native American artists and they don’t take special orders. Here are a couple of other posts that talk about why special orders aren’t an option with us.
The style of buckle you have there is one of the styles that is made for use to finish off a concho belt.. a buckle with a tongue.
The other, more common type, is a plate style belt buckle with a post on the back. Here is an example of that type on a concho belt.
Here is the closest thing we have to the style and size of buckle you are looking for:
As far as where to send you to get that buckle made, I just don’t have a single suggestion. But I am posting this on my blog so if someone does happen to see it and sends me a referral, I’ll be sure to pass it along to you.