Rigid = Surly Instigator or Kona JF (Jump Fork) -
...I've got a Surly Instigator fork on my Azonic Steelhead - very burly and strong, yet relatively light (all things considered)...
Edit Cloxxki : Spam content deleted, it's only allowed to offer products for sale with an accompaning mtbr classifieds ad. One forum mention per ad.