Monacor RCP-8732U 1U Rack Panel with 8 D Type XLR Holes at Gear4music
1U Rack Panel Pre-Punched with D-Type holes Flight Case 19inch Rack | 4/6/8 Hole | eBay
StarTech.com 1U Blanking Panel - Metal Rack Mount Filler Panel - for 19in Server Rack Enclosure or Cabinet - Steel - Black (BLANKB1): Amazon.co.uk: Computers & Accessories
1U black flat steel 1.5mm blank 19 inch rack panel - AllMetalParts