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Hi Jeremy,
Perhaps ask a local Pharmacy about getting some "Reagent grade" Isopropyl alcohol. Some may consider this overkill. There's many ways to define purity of the stuff (that I don't know the finer points of), but AR reagent quality is a safe bet.
I'm lucky to get small amounts for free were I work. Regarding the Amazon example, it says 99.9%, but it seems too cheap to be true - just my thoughts.
We all agree with Nik on Amazon, though perhaps Nik hasn't noticed your location. Amazon is good in Japan, where my wife gets things sent to her Folks.
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