Bench seat center armrest seam trim

[MoparcudaRay]

Bench seat center armrest plastic u-shape seam trim. Were the heck do you get this?
It did not come with upholstery kit. I changed from brown to black and need a black one. I did try painting it but it scraped off when lifting it up and down.
Thanks

 

[MoparcudaRay]

Still looking for new one but at this point will even consider a used one in good condition. Thanks