Lots of places, do a web search, try ebay.... But buying a new program b/c
you hope it will fix unspecified crashes is really a leap into the dark.
Try troubleshooting your excel first. Some easy things:
1) rebuild the desktop
"Procedure: Restart (or boot up) your computer. As soon as you hear the
opening ³chime,² hold down both the Option and Command (Apple) keys. Do not
release these keys until you see the Rebuild dialog box, which may take a
couple of minutes while all your extensions load. Say ³OK² to the Rebuild
and go have a snack while the process completes." [Quoting someone else]
2) Generate a new prefs file, they can often corrupt
Quit Excel. Find the Excel Settings (8) file in System Folder: Preferences.
Drag it to the desktop, let Excel generate a new one on launch. Reset your
prefs, see if that helps.
3) Increase the memory.
Navigate to the Excel 98 application in the Finder, select it and Get Info
(Command> i). Go to the Memory pane and raise the Preferred Memory, leave
the Minimum Memory alone
4) "Also, be sure Virtual Memory is turned on (Control Panels> Memory) and
set it to physical memory (³Available built-in memory²) plus 1 MB (this is
the default setting)." [Quoting someone else]
If this is a reproducible crash, post back, there may be other things to
try. These are just general maintenance tips, if Excel freezes randomly.
I found I preferred Excel 98 to Excel 2001--Excel 2001 switched the keyboard
shortcuts to use control instead of command and won't let me switch them
back, and a changed AutoComplete function annoyed me so much I had to stop
using it, so if you are a heavy user of Excel I would not suggest switching
versions until you go all the way to OS X.