The Nashbar fork should be a good budget option. Soma MTB 26" forks CrMo 26? MTB Disc Fork | SOMA Fabrications which are advertised as suspension corrected for 100mm travel have axle to crown length of 453 mm, which confirms the calculation.
I did a similar replacement for a Hardrock, but it had 80mm travel, and I needed a different axle to crown length (went with Big Dummy fork).