We offer several hinge routing jigs, including options from brands like SOSS, Richelieu, and Milescraft. While none of these are specifically categorized as "8-foot" jigs, some feature modular or adjustable designs. To find the most suitable option, please review the search results in the side panel. For specific compatibility with 4-1/2" hinges and your desired length, please contact our team at (877) 509-8040 for assistance.