aside from the joiners, and the final IC-TB hose, it is all pretty much hard pipe as standard Shy!
What are you wanting to replace with hard pipe? Is this something to do with your planned FMIC? If so, it's still going to need silicon joiners anyway.
get decent 5 ply silicon and you won't have a problem. Just use it for couplers, instead of running any lenghts of it.