Omega 6b/159 recase advice

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Hey everyone,
I have an orig dial, hands and mechanism of 6b/159 and a generic replaced chromed case.
I guess finding an exact model case might be difficult (or expensive if buying the whole watch), though I do want to fit it to a stainless steel case.
Any idea how can I find one?

Thank you guys I'm a newbie and will appreciate your advice.
Edited:
 
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72
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358
Best bet is probably a Dennison 13322.
Thanks man
Can you show the Caseback ?
Attached, other side of the case is empty..