World Of Chel Stadium upgrades

Is there something special you need to do to get stadium upgrades such as the glow sticks for fans, the on ice pregame spotlights, etc? I have a club with a couple buddies of mine, we played over 60 games in club finals, won 2 elite cup banners, got to division 3 playing quite a few games, yet we got horrible/useless drops from the bags. Are there like challenges you need to complete to get the actual cool stadium drops/upgrades? Can we just buy them somewhere?

I'm really hoping the answer is not "keep opening and bags and pray" because that will be one way to just continue to kill an already struggling player base