It wasn't very long ago that a person could go online and get a parts breakdown on 30 year old tools. Thats all gone now. Sears is about as helpful as Walmart. I use a scroll saw like this.

http://www.cpometabo.com/metabo-602298850-sta-18-lt-18v-cordless-lithium-ion-jig-saw--bare-tool-/mtbn602298850,default,pd.html?ref=nextag&zmam=31282435&zmas=47&zmac=163&zmap=mtbn602298850


It uses the same battery as my cordless drills and parts are available.