Rubber boot for Infinity Modulus MS-1 Speakers

I've a set of Infinity Modulus MS-1 surround sound speakers - which includes four wall-mount speakers. One of them fell recently because the rubber boot on the sphere had degraded. No parts are available, so I modeled up a couple of replacement options.

There's a thin and thick version - try both and see which fits better. I printed them on a Lulzbot Taz5 with a FlexyStruder and NinjaFlex filament. If you rotate it before printing so the T-shaped cut is at the top, it'll print without sup