The first ramp I came across was on a Fender Roscoe Beck signature and then on an Ibanez Gary Willis. They seem to have become quite de rigueur with a number of modern players.
On a ‘Ray, I’ve always found the pickup perfectly place for me to rest my thumb when playing the E string. It appears that Tim Commerford likes to have his hand further north (it being his signature model).
Fender do a specific SS gigbag as do Maruszczyk and then there’s the TGI Extreme (doesn’t fit a Mustang). There was a thread about SS cases and bags a while back.