As long as you have a handrill (drillpress) and only require 90* bends....think about bonding the shafts inside a hole rather then overtop a cylinder.
Buy some dice (dice - yes, the ones you roll) and drill a hole (same size as the arrow shafts - OK, just a tad bigger) in adjacent sides. Put JB weld in hole, place arrow shaft in hole - voila!
Why dice? I was going to recommend plastic or aluminum but dice are super cheap, very hard, ultra light, and if you go to a games shop type place, they come in all types of sizes.
Anyway, that's what I'd do :)