If you cut the tube to short can you replace it? Or are the forks shaged

fecked, usually
sell then to a dwarf 😉

how much too short ???

What forks? how short?
you may be able to find new crown/stantion/steerer thing at mojo/TF and the like. Not cheap tho.
or sell to someone with small head tube

http://cgi.ebay.co.uk/ROCKSHOX-PIKE-454-U-TURN-1400mm-DAMAGED-TRICK-FOR-STUNT_W0QQitemZ220516598415QQcmdZViewItemQQptZUK_sportsleisure_cycling_bikeparts_SR?hash=item3357d0428f#ht_959wt_1167

how did the mounts snap?

Now that is short

So it needs a new crown/steerer AND new lowers as the post mounts have snapped off!

BTW
steerer
shagged

Spare parts ?

what about the disc mounts?

some sucker's bid 50quid ;-0

Saw them as well. Maybe worth a few quid for the internals (if they're not also shagged) but otherwise ready for the bin. Didn't think you could replace just the steerer.