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You can find esun petg on Amazon. PETG is different to PET and requires a bit less printing temp. Best print with 240 to 250 Celsius. http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Daps&field-keywords=esun+petg PETG is aimed to replace ABS on some applications where high impact is needed ...

PVA is supporting material best with PLA. HIPS is supporting material best with ABS. PVA absorbs water badly. So once you opened the spool but not able to finish all, you better seal remainings with dessicant in an enclosed space. Otherwise, a few days later they become paste :) On the other hand ...