I’m just rediscovering this thread after some time away. I’m very curious about how people’s home made sleeves have been working out, and have been kicking around the idea of making a one-piece vacuum ads out of silicone.
Here is another possible source for silicone. These products are meant for the food industry, so it would seem that they’re very safe for use against the skin. They’re also very easy to work with, and don’t require vacuum deaerating: