Yes, I received the press release earlier this week:
http://www.effectsdatabase.com/model/eh/xo/bigmuff/bass/deluxe

Yes, it should be possible, I’ll have a better look when I have some time

I’m not 100% sure what you want, but here are 2 solutions for 2 different problems:

You can bypass multiple pedals in the effects loop with a bypass looper or use a programmable looper to switch between combinations.

Or do you want to switch the pedal(s) between the SuperEgo’s effects loop and the “normal” signal path (before/after the SuperEgo)? Then you can use an A/B loop switcher for 2 loops, connect the pedal(s) to in/out, the Superego loop on loop A and the normal signal chain on B.

If it has a status LED it’s a reissue, if it doesn’t it’s a vintage one:
http://www.effectsdatabase.com/model/eh/bassballs

The black and green Sovtek reissues are all out of production:
http://www.effectsdatabase.com/model/eh/sovtek/bassballs

Not sure how easy that will be, it’s quite special without moving parts etc.