Please Help!! Sodium Acetate Crisis!

[UnderPressur]

My son and I tried to make homemade sodium acetate with baking soda and vinegar and filtering with carbon..no luck! His project is due in 2 days and NO ONE sells sodium acetate at stores anymore! I am stuck..i want to try the homemade version again...can any one help? This is for making hot ice but we already used the Instructables version...or is there something else I can substitute ???:doh::doh::doh::doh::doh:

[YT2095]

http://cgi.ebay.co.uk/250g-Sodium-Acetate-Trihydrate-Hot-Ice-video-link_W0QQitemZ330234123323QQihZ014QQcategoryZ104233QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

or you could go to a camping store and buy the hot packs