Welcome, there's lots of information on stuff down here in Seoul, not much up where you are.
You might be able to find a
juice that doesn't crack, but until I moved on to GG products I found MAP
tanks (CoV sells) work quite well. They do look a bit goofy on smaller devices (it's a 5ml tank), but they do work wonders. If you ever make a trip down to Seoul I can show you some, and probably give you one as I'm not using the 6-7 of them I bought.
CoV used to get here really fast, but they moved to Florida so back to the normal 1-2 week wait (APO mail). Some how FSUSA still gets here in about 4 days most of the time. Liberty Flights is pretty good on timing too, but most of my orders have been COV lately. If you're interested in starting DIY, and want to come down to Seoul sometime, I can get you started... I have TONS of supplies.