Fork replacement for '95 Schwinn Moab
I'm not a 100% sure however I think the 'spring' in those forks was actually elastomers.

The linked Suntour fork appears to have the correct steerer type (threaded) and the steerer is long enough. A big problem though is the axle to crown length of the fork as it is 100m travel. It is likely that the Suntour fork that you linked to will be significantly longer than the originals. This can lead to undesirable handling and more importantly could cause the head tube to snap off the frame due to the increased loads. The Amazon listing shows the axle to crown length of the Suntour fork. Measure yours and compare the values. To measure extend the fork to its full length and measure from the centre of the axle to the underside of the crown race.

The crown race sits on top of the fork's crown and runs against the bearings. In the top down picture is is the stepped silver circle between the steerer and the dirt on the crown. You do not need to measure this as it is part of the headset. In the linked fork the crown race measurement of 30mm is the same as 1" 1/8. 

You can reuse the current bearings. To do this you will need to (carefully) remove the crown race from the current forks and fit it to your new forks.

In my opinion it will probably be easier to find a suitable rigid fork than a replacement suspension fork.

If you do replace the forks I suspect that the original Marzocchi item might be worth attempting to sell on. In my country (UK) there is a strong market for retro parts, even broken.