We do custom welding of mild steel and 4130. I have built engine mounts, landing gear, fuselages and weldments. If its made from steel I can produce a finished product if I have prints or the original part to copy.
Here are few examples:
The first series is an Aerotrek 220 that suffered a hard landing.
We produce parts for a few manufacturers. Here is a tail wheel that we drew up and then produced.
To the right is a landing gear built off of prints