Scale Aircraft Conversions has produced replacement gear for the Italeri/Testors 1/72 scale C-130 family of kits. The white metal replacements are an identical fit replacement for the kit plastic parts. The supplied items include two main gear struts and the nose gear assembly. Some other SAC packages include replacement wheels, as well, but this is not the case here. You will need to use the Italeri/Testors kit wheels for your build.
A side by side evaluation (see photos) indicates an identical replacement that should provide a greater strength assembly with a significantly improved weight capacity and abuse tolerance. However, use some care, because in this scale, even cast metal parts are very fine and fragile. I found it easy to accidentally bend them out of shape with my heavy-handedness.
In some cases where original equipment was left in a natural metal finish, painting may not be necessary. As always, check your reference photos.