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I have this
forum.linuxcnc.org/39-pncconf/32400-mesa...pport?start=60#89231
A box with 17 resistors and 17 LED's, a male and a f-male port, nothing else.
Not versatile as yours, but it has also the option of connecting between the PC and machine and monitor in real time.

If anyone needs [2] a simple circuit to test parallel port pin by pin as either input or output, this is good solution.

No ICs and no transistors required.

More about here: forum.linuxcnc.org/18-computer/55803-a-s...el-port-tester-board