Small Engines (Lawn Mowers, etc.): Craftsman Backpack blower, new tank, partial search

Question
John, I purchased a craftsman backpack blower off of ebay about a month ago and I went to use it for the first time this weekend and the gas tank is cracked all the way around. I need to purchase a new tank for it, but being as it is an older model I'm not sure if this is even an option. Do you know if the tanks are available and how much do they run??

Model #636.7912
Craftsman Backpack Blower 37.7cc
2 cycle engine

Answer
Trying to look up the parts blowup on searspartsdirect came up with
nothing, but a partial search on that prefix shows that it is
made by Robin, and going to Robin's website, they have a link for manuals, so the parts should be available through them.

http://www.robinoutdoorpower.com/manuals.htm