What type steel tanks do I have? Where to buy oms manifold caps?

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Bigeclipse

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i have a set of manifolded steel 100s that I thought I would break down from the manifolds. I got these through a shop not knowing any better. Just knew they had a fresh hydro. Now that I want to break them down I notice they have the older style oms manifold and I’m worried they are the 7/8ths style neck. I either need the oms manifold caps which are not available anywhere or I need to buy new valves. The only numbers I can read on the tank are as follows:
DOT E9791 3500 tp5250. What tanks do I have? My best guess is they are the notorious PSTs and they are indeed the 7/8 neck. Could someone please help? Does anyone know where I can get the OMS manifold caps as that would be cheaper than buying 7/8 valves and would give me the left and right facing valves which I’d prefer to have for sidemount. Thanks!
 
I might (or might not) have the caps. Shoot me a PM with your location and contact info. If you're close, I might be able to help. It would be helpful if you posted a pic, too.
 
Here is one pic. Already took the manifold connection off
 

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Hard to see the stamp but here is some of it
 

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7/8 neck PST is correct. Lake jocassee scuba was said to have some caps available iirc.
 
I think it was @tbone1004 that said Lake Jocassee Scuba had OMS parts. He might know if they have any
 

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