Modern Suites Fire Electric Fireplace Off White MDF Surround Suite LED Flame 2Kw | eBay
Trent Fireplaces 54" Garcia Surround in MDF with Flamed Granite Back Panel and Hearth (Ipswich Shop) - Zigis Fireplaces
Easy, Elegant Mantel - Fine Homebuilding
How to Build a Fireplace Mantle | The DIY Playbook
Freestanding Wood MDF Material Fire Place Surround Mantels Indoor Decorative Faux Wooden Electric Fireplace Mantel - China Wooden Fireplace Mantel, Electric Flame Effect Wood Burner | Made-in-China.com
Not sure if MDF counts but my friend asked me to build a fireplace surround for him and I'm super proud of how it turned out! : r/woodworking