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There are numerous OS/2 themes here.  Stardock, the developer of WindowBlinds, was once the world's leading ISV for IBM OS/2. Object Desktop (which WindowBlinds is part of) was, after all, an OS/2 product first.
If you want Windows to look like OS/2, WindowBlinds is the only way you're going to be able to do it. 
https://www.wincustomize.com/skins.asp?library=1&SkinID=1664
 
Style XP just patches your system DLLs which effectively enables you to replace graphical resources.
Your "Mac" theme has the buttons on the wrong side. OS/2 has the close button on the left of the min/max buttons (which, btw, was based on a Stardock design for OS/2 Warp 4).
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