Update Sep 16th 2018: I decided to go with a proper design for my PCI-E card (so leaving the eSATA ports available on the back of the PC so I've added another model with the "back holes" and slightly adjusted holes for screwing in the card to the bracket.

I needed a low profile PCI-E bracket to expand my HTCP functionality with some extra SATA ports as I already had a standard PCI-E card with normal size bracket. I found this awesome model that I remixed here (huuuuge thanks to the original author!) and managed to easily close the hole it had and it fit perfectly to my PCI-E SATA card, so my HTPC is now a happy camper with some extra storage ready to grab some multimedia!

Please note: My card has 2 extra eSATA ports on the back but I don't need them so I decided to cover them completely and save some time tweaking the holes positioning :D.