Building A123 packs

[DLS II]

Hi, I'm going to build a saddle pack for a 1/8 pan car I,ve built. I'll be using 8 A123 cells which I will configure in 2-2s2p packs. I need 42mm clear shrink and some solderit al. soldering paste. I recently picked up a 100 watt iron and some 63/37 solder. (I added the iron to my collection-5) Anyone know where I can get the shrink and the paste? Thanks, Don