1998 ski natique bottom parts

ouch... glad everyone was OK.    On the prop and shaft, you might be better off with a new CNC prop and a dual taper shaft.   Lots of people are talking about the upgrade of both being well worth the effort.    

if not, there was a prop on Craigslist from a 91 SN for $100 on Seattle craigslist yesterday.
OJ from a 91
This looks like an original hand laid prop, so not going to get a performance increase, but it might get you on the water.   
Try Nautique parts, ski dim or N3 for the rudder.   Not so common to see 98's parted out, but they do come up from time to time.   the tracking fins are probably not year specific and may be easier to find.