Going with heatshrunk clear canopy. My best stuff long enough to cover my plug is the Trinity Brand, sub-C Cell stuff (Think RC Cars here). That is Trinity, not Turnigy.
So a small piece of foam was fashoned as I added some glass along the way. This part is so small and fragile that heat was affecting it without the glass and epoxy to protect it.
A conduit tube and some scrap foam was used to fill out the mass before applying heat. Shrunk product shown.