Amazon.com: Valchoose Upgraded 5” X 50 Ft Wire Mesh Hole Fill Fabric, Stainless Steel Mesh Gap Blocker Easy to Work with, Flexible Stretchy Hardware Cloth Fill Fabric DIY Kit, Perfect Hole Filler :
Amazon.com: Stainless Steel Wire Mesh, 12" x 12",(3/16" x 3/4" Holes) : Industrial & Scientific