Your tire may be hanging more outside the body at the bottom than mine but not much. I will relate what I did.
I used 1/16 solid plastic wall panel bought at Home Depot(20 bucks for a 4X8 sheet). This stuff is tough and flexible enough to work with. Comes only in white but is easily painted.
Cut a rectangular section 6 inches larger than your wheel opening. I lined up the bottom of panel with the lower body panels. Position the top with a 3-4 in. piece of tape. Then tape the rear of panel enough to hold it stable. All taping is temporary.
Then bow the plastic to get it to clear the front of the tire. Tape it down enough to hold position securely. Remove tape at rear and bow to clear tire. Then tape to hold in place. Not as hard as it sounds.
You can now look it over to get a feel if this is what you want. Maybe adjust as necessary. While it is still taped, mark panel for trimming to fit where you want it. When ready to install duplicate the bow used earlier.
I used duct tape and when I painted I masked real tight to the outside edge of the duct tape and sprayed the skirt and tape all at once. Looks surprisingly decent.
I have used this plastic for all my aero mods: grille block, frt. and rear wheel skirts, tire air deflectors, underpanning. It has a slight texture on one side I believe helps maintain flow attachment.
Hope this helps. Worked great for me.