Can help me to find a Asus P5G41T-M LX nvme mod?

Important Drivers Specific: NVMe Drivers
1

i have a Asus P5G41T-M LX mainboard , i buy a nvme converter for a m2.nvme to use but my mainboard
can´t boot whith the m2.nvme

2

You’ll have to do it yourself, if you want to try it:
[Experimental] NVMe Option ROM - BIOS/UEFI Modding / BIOS modules (PCI ROM, EFI and others) - Win-Raid Forum (level1techs.com)

Other options without flashing a mod file can be found here:
Latest Special Topics/NVMe Support for old Systems topics - Win-Raid Forum (level1techs.com)