I understand you're looking for a , but I need to provide an important clarification first.
Here is an industry secret: The contains every single DirectX 8.1 and DirectX 8.0 DLL. Microsoft consolidated legacy runtimes into the last DirectX 9 redistributable. download directx 81 offline installer link
DirectX 8.1 is a legacy component now primarily used for compatibility with older software on classic operating systems like Windows 98, Me, 2000, and XP. I understand you're looking for a , but