I would recommend the GB1018CutJ. These are not custom fit but will be the right width for your wheel well.
https://www.sharptruck.com/truck-hardware-gatorback-mud-flaps-jeep-10x18-cut-style-gb1018cutj
I would recommend these, https://www.sharptruck.com/truck-hardware-gb1018cutj
They are 10" wide instead of 12". They come with self tapping screws to fasten them to lip of the wheel well.