trim - Colonial style casing / backband and alternatives - Woodworking Stack Exchange

Here's my issue, I have windows and door casing that appears to be 1x6 that was custom routed, my down stairs is almost identical but has a backband. My current baseboard trim I've come to find has

trim - Colonial style casing / backband and alternatives - Woodworking Stack Exchange

trim - Colonial style casing / backband and alternatives - Woodworking Stack Exchange

trim - Colonial style casing / backband and alternatives - Woodworking Stack Exchange

Shaker Back-Band Trim

ES16 Backband - Jaeger Lumber

How to Build ARCHWAY-101 Part 7: Flex Trim Backband & Keystone – The Joy of Moldings

This Old House Westerly Colonial

Back 2 Back Band