I did it to mine. I was able to find used cage parts and netted out with selling the POE top. However, softtop cage parts are hard to find and the ones you will find the foam usually is pretty bad.
You need the B-pillar hoop, the two canrails, the C-pillar hoop and the two diagonals. Everything else is on the POE. If you want a soft top, you need the header bar, the two five snap door bars and the alpine bar.
*not legal advice*