Here are the lace in slide plates that I made for my new (used) Vortek VK7's a few weeks ago.
Not sure if you can tell, but I tried to wrap the boot plate around that inner corner a bit.
Initially, I thought that sewing in my jenpro tab would be more difficult with the Vorteks because, unlike most pads which feature a distinct seam on the inner edge from two seperate pieces of jenpro used on the face and the inner gusset of the pad, Vorteks use in piece of jenpro that covers the face and wraps around the inner gusset as well. There is some stitching, but it is mostly aesthetic and designed to wear away.
Without the distinct seam, I didn't think that I had anything that I could sew into. But, a clever feature about the Vorteks is that they lace together at the binding in the back medial side of the pad using nylon cord. I was able to easily open up the the pad by unlacing the cord and I removed some of the shred packed LD foam so that I could get to the inside of the inner gusset and sew in my medial roll, using the aesthetic stitching as my guide to for a straight stitch.
Unfortunately, the lace in feature does not extend to the binding in the boot portion of the pad, which is sewn shut. Fortunately, there is a distinct edge along the front seam that I could sew into because different pieces of jenpro are used for the face and the gusset portions of the boot.