trim - Colonial style casing / backband and alternatives

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

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trim - Colonial style casing / backband and alternatives

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trim - Colonial style casing / backband and alternatives

Colonial Trim Baseboard trim, Moldings and trim, Floor trim