Indeed, as was the case for the other ones (ie. you couldn't get an object ptr for OP_ShroudSelEquipDetail without having first opened the window via OP_ShroudSelectionWindow). There's a sub that's specific to these opcodes and I've exhausted them hunting for the one that enables this one. I think I'll need to dig into some of the higher level unhandled opcodes. Just in a few minutes, I found quite a few that weren't referenced in patch_Titanium.conf, so I can go through those, I guess:
#0x11cd .text:00404D2A
#0xd743 .text.004515DA
#0x79b4 .text.00461682
#0x7c59 .text.00461671
#0x7abc .text.0046168E
#0x7c12 .text.0046169A
#0x7c32 .text.004616A6
#0x6966 .text.004611AC
#0x6A00 .text.004611B5
#0x6C97 .text.004611BD
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