Is There a Good Adaptor for M.2 NVMe SSD?

Finally, I bought a Samsung 970EVO Plus M.2 NVMe SSD. Now I found out that my old mobo doesn't has M.2 key. Any suggestion ? Thanks.

I have an extra PCI slot, would something like this be suitable Silverstone M.2 NVMe SSD NGFF to PCIe x4

UPDATE: Got the adaptor, plus it in my PC recognize it straight away. Do some double check from this post Turn out my mobo already in Intel Management Engine (ME) Version 8.1. Will clone the OS to new drive and see if I can boot from it. The BIOS from the post is different than mine, so I went to ASUS site and get a latest possible BIOS update.
No success so far …