RPI only sells to research labs and the like. I ordered 3 of it and I must have flown above radar range. After a few polite email exchanges, my order was cancelled.So I got my USP urea a week ago. I was able to get a much cheaper source, from www.rpicorp.com. One 500g bottle cost me only $25 plus $17 shipping to a US address =$42. Costs about 40% of what sold at Health Natura or at LifeGiving Store. It makes sense to buy from RPI only if you're using large quantities, which in my case that 500g lasts only 17 days at 3x10g/day.
But not a bummer. I found another source that is cheaper: www.laballey.com. I'll probably buy 2.5kg worth of the ACS grade. It won't even last me 3 months at the 30g daily rate I've been using it. It costs $72 and it doesn't charge an arm and leg for shipping too.
We'll see if they're just as strict as RPI.
p.s. Btw it's not so difficult to drink anymore. I used to drink coco water to chase down the taste after drinking it. But now I've gotten used to it. I put about 10 g in about 150g of water, mix it, and drink it.