Yup! That's exactly what I did (or am having done as we speak). I'll be able to show you how it turned out in a week.
The way I did it is as follows: 1. Ordered the westone ES cable for $32 off their site. 2. found a local audiologist in my area, who took a mold of my ear with silicone. 3. I sent the mold, my IEM's, the new cable, and a money order to InearZ.
If you want to see examples of this, do a search for "InearZ owner's thread." It's loaded with pics. While most people remolded TF10 IEM's, it's totally possible to do with SE530's. The result, for me, is a custom fitted IEM to my own ear, with the sound quality of the SE530, and with a really nice cable that won't ever fray on me.