Good advice here. Having swapped the suspension on my civic 3 times now, it is a lot easier having complete assemblies
This isn’t really an “unless” situation. there’s a 98% chance at least one bolt will have seized, and you’ll strip one of the heads off. Used LCA’s are allover car-part and won’t set you back too much at all. New bolts can come from home-depot/lowes, but I HIGHLY RECOMMEND you go to honda and get new bolts.