They are all not the same. I would call the guys over at Midwest MasterCraft in Crystal, MN and they should be able to hook you up. Good idea to plan ahead. If you are handy, you may just need to recalibrate your empty and full settings on your sender. This depends on the symptoms of your gauge. Either way the guys at Midwest MC can walk you through the diagnosis.
http://www.waterskis.com/