I believe frodo also indicated to get rid of that offset in the main line going by the shower.
By the looks of where that shower drain is, you shouldn't need the offset to connect up the shower drain to the main line.
But if the shower drain was in the center of the base, it probably would be in the neighborhood of 6" or 7" or so away, which would make it tougher to tie into.
I can't rely on them having a cross available, but I think this should work just as well for the bath room cluster, no? Thanks for your patience! (I was able to get my hands on a double 4" tee for the toilets) https://skfb.ly/6NwBs