STM32CubeProgrammer external flash loader for a single MT25TL01G on custom board with STM32H750IB.

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We have a custom board using STM32H750IB and a single QSPI flash memory MT25TL01G. The QSPI pin for the flash memory is the same as STM32H750B-DK board, which is PF10 for CLK, PG6 for CS, PD11/PF9/PF6/PF7 for IO0-3. 

I saw several posts mentioned the external flash loader for this configuration; can anybody share the source code or the flash loader file? Thanks for the help.