if they are all the same brand, you may be able to use direct connectors which would be even smaller than slim angled cable since there would be no cable at all.
EDIT: Like this: http://www.sweetwater.com/store/detail/MCLM/
except that I've actually seen smaller ones. Just can't seem to find any one the web at the moment.
2nd EDIT: here's some for less than $2 each on Amazon: http://www.amazon.com/Rean-NYS237-Mo.../dp/B0008JFHDI