Ok looked up what a 4100 was..

Just buy a new MTB Suspension Fork . or a rigid one made to replace suspension forks .

or, agree with RG, overhaul both and mix and match
the stanchion/blade tubes & steerer fork crown assembly.

as you should know, the suspension comes apart from the bolts on the bottom ends
of the cast lower portion.

If that is news , you may want to delegate the work to a Shop.