Not without a client texture mod... but then all your sg members would have to load the same mod in order to see it.
Would be a nice QoL, but not sure how difficult it would be to implement.
In the meantime, there is the alphabet or sg logo items.
Personally, I just keep IO's in bins by level. Members are on their own for sets/specials.
Since we are allowed to have 3 builds, it's possible to have a "running" basic build and set up a "super" build that can be specced as enhancies get made... least, that's what I tend to do.