That might be a good idea but shipping costs would be pretty high. I ordered ours from an Ornamental Steel & Iron shop that's about 25 miles away in a larger town. They didn't have any in stock so they had to order it. Had no luck here where I live finding anything.
Not sure what size 13 ga expanded metal is but if a 13 ga wire is close it should be fine. The box stores in my area that had E M were way high for 4 x 4 pieces. Hope this helps.
55 gallon smokin' UDS
BBQ Grillware vertical gas smoker
WSM with mods
ECB Deluxe (scrapped for parts for the UDS)
BBQ Grillware gas grill
Pro-Q Exel 20
High Desert BBQ