You may have to use your imagination and just do some wandering around at some Home Improvement stores to see what's available. I've done a LOT of home remodeling over my 62 years of life and have found that conventional, normal, cookie-box cutter items rarely works with something that already exists. Almost every time I stumbled into a problem like this, I find myself wandering around the store in some section completely unrelated to the item I'm actually needing, and then .... BINGO! And idea is born.
My wife wanted a hat stand and wanted me to either buy one or make one. After searching the easy way (buying one), I drew a blank. I found myself one day in the curtain rod section and then it hit me! One of those curtain rods with the rounded ends, cut in half (to make 2 posts), stud in a block of 2X6X6 with a hole in the middle to support it, sanded, stained, varnished, and detailed, and BINGO! She had a hat rack she could put on her desk!
So, if you look around, you might find some kind of molding that might work far better than anything solid wood. Maybe a garden hose with lost of flexibility, painted, and attached for a small, really unique crown molding look. Maybe black electrical tape to emulate crown molding. Maybe a rubber seal that would be used around a door frame? The sky is the limit, only limited by your immigration and construction skills.
I'd look for some L shaped rubber seals that goes around windows or doors and then tack it on with some finishing nails and Liquid Nails. Something like that.