Based on this product's specifications, here are some alternatives and similar models
Roller Lexmark 40X7774
Summary description:
The Lexmark 40X7774 roller is designed for optimal performance in Lexmark printers. Compatible with models MX812dme, MX812dfe, MX812dtfe, and MX812dte, this roller ensures smooth paper feeding and reduces the risk of jams. Each pack contains one roller, making it easy to replace and maintain your printer's efficiency.