Camp Uke Skin and Bridge Question

Anyone know how to tighten the skin on one of the old camp style Ukes?

I attached two pics of it.

Does anyone have a picture of the correct bridge or dimensions of the footprint of the bridge? This is a replacement and I want to make something at least similar to the original. Have no idea what the original looks like.

It sounds real plunky, I like it but I need to get it playing a little better to use it.