People don't like the idea of gloves because it makes the bar thicker, making your grip weaker. This translate over to the thicker the gloves, the harder to grip. I've found gloves unnecessary, but...
I had a blue 13mm lever made, and it was at my door right at 3 weeks. It will depend on their order amount. I'm very happy with it, definitely worth the wait.
Your plans seem more geared towards a home gym. People don't want to pay money to have to adjust their own dumbbells, they can do that at home for cheaper.