You can't. It is no longer manufactured. However, there are other products still manufactured that have 41% glysophate. I have no idea what is available in your country. You will just have to get on the internet and search.
The powdered glyphosate can be priced cheaper because it is lighter for shipping and handling. You just have be able to use a scale and mix by weight for proper percentages or you will be running around yelling about how it does not work.
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