How long will it be to get a replacement?
I doubt there will be any in stock as A spare.
Several months usually. With a rush job that can be cut to one or two perhaps, but that's assuming that's a complete order from nothing, which would assume this is a wholesale write-off, which is unlikely.
This will be very closely inspected and a list of new parts ordered that will be made in a rush if needed. Bearerers can have concrete chips out of them and be repaired rather than replaced, as long as it's not significantly cracked, which would be a much bigger repair or a replace, especially if the crack goes through to the rebar, in which case it would very probably be a replace.
Switch/stock rails - these take a couple of weeks at best, assuming they aren't anything paricularly complex and that a rush slot can be found, which may not be the case.
If the crossing is damaged, that's probably longer and a lot more expensive too.
Then there's the point motors, rods, locking, points heating strips etc, but all these are fairly standard so should be easy to replace if needed.
The metal bearers for the point rodding could be bent, and these would then be replaced, but these should be fairly standard.
I do hope that wherever it was going can cope and this doesn't delay a project or renewal somewhere, although it may well do. Being delivered by road usually means it's delivered a short while before the possession, so if the site is lucky there's time to fix it and stilll install it.