This is how I picture Vegetto Jr. would look like. For the clothes combination I used the same logic for Vegetto's clothes. The bust and pants belong to Goku Jr. while the gloves and boots belong to Vegeta Jr. Like normal Vegetto the color of Goku Jr's clothes are inverted. As such the outer gi and pants are colored a dark blue to match Vegeta Jr, and the shirt is colored like the outer gi. The boots are pure white due to Vegeta Jr. using those type of boots while also wearing fingerless gloves. I added the headband for Vegetto but decided to keep it out for SSJ3, as I imagine that the sheer energy SSJ3 emits would blow away the headband.
I might make a Gogeta Jr. later, as it's not nearly as complicated to make as this was.
-Includes Custom Skillset
put data2 file in Xenoverse directory.