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

CLASSICAL COLONIAL CASING MOLDING BUILDUP

Square Cut Casing Miskas Wood Products Inc.

Transform Any Room - Door Trim Upgrade - Renovation Insider

Keim Crown Molding, Baseboard, Wall Trim, Interior Doors

4 Tricks to Match Old Trim - The Craftsman Blog

Beef Up Door and Window Casing with Back Band - Pretty Handy Girl

Craftsman Style Door Casing - WindsorONE

WM356 Colonial Casing - Mouldings - Garden State Lumber

350 Flat Ornamental + Big Back Band – The Joy of Moldings

Casing 351 - Next Day Moulding Doors & Stairs