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

Oakville, Colonial casing with backband - Traditional - Living

Casing Products, VIP Classic Moulding

Upgrading the Basic Trim Package for a Colonial Home - Fine

1x4 with backband on window, 1x6 with backband on entrance

Classical Colonial Moldings, 18th century style

Our 6 Most Popular Moulding Profiles – Horner Millwork

Colonial Casing, San Francisco, CA

Kuiken Brothers' Classical Moulding Casing Features Proper Scale

3″ MDF Colonial Backband Casing : Pinevalley Trim and Doors

4 Tricks to Match Old Trim - The Craftsman Blog

3 x 1 MDF Colonial Casing Backband – Cambridge Crown and Trim

Midwest Mouldings & Millwork - Colonial Plinth Blocks

Ekena Millwork 2-1/4 in. x 3/4 in. x 96 in. Colonial Casing

ES16 Backband - Jaeger Lumber

Doors and Windows Molding Designs and Diagrams

1-3/8x1-3/8 Contemporary Backband BBPL7 – Public Lumber

Back 2 Back Band

IR) Backband, Immersion Research – Seaward Kayaks Inc.