430 Track tensioner

[deeretails]

I've a 430 C 4 roller machine. Nothing fancy, just a nice original crawler. It was shipped with hydraulic track tensioners, but they were gone when I bought the crawler, and replaced with some steel plate. Not pretty but it worked. I'm redoing the undercarriage and wondering it a set of hydraulic tensioners might exist anywhere, like to make the machine original. They don't need to be perfect, but rebuildable.

Thanks