celtic knot patch/embroidery
 

I've been trying to find somewhere to purchase some celtic knotwork
embroidery to sew onto my leather jacket.

I'm ideally looking for a border piece to put along the top of the
back... is there anywhere that sells such things, or would I have to
get a custom design?

My google searches have been quite unfruitful. All I can seem to find
are celtic pentacle patches, and sports patches.