Check the allowable voltage input ranges for each and if they have overlap just buy a big power brick (like a laptop charger), cut the ends off of each of the supplied wall warts and solder+shrinkwrap them all together into a nice neat harness. This has the added benefit of saving a tiny bit of power assuming you get a decent main supply.

Tip: thread the shrinkwrap first before soldering. This will save you much swearing.