Making my own Nutirents , How to get these ingredients?

I want to make my own Nutrients, This is just for experiment, How do I get a hold of these ingredients as follow.

monopotassium phosphate
sodium nitrate
magnesium sulphate
calcium cholride
boric acid
manganese sulphate
copper sulphate
zinc sulphate

You can buy a single product that will have all the micronutrients in it (or just use tap water if it's decent in your area) which would leave you with just needing to furnish NPK (and there are a lot of sources for NPK listed online). Just depends on if you are wanting to provide NPK organically (and rely on microbes to make it available to the plant) or if you are happy with ready to go water-soluble NPK. I'd look into brewing teas from compost either way. There are a lot of tea recipes online if you dig a bit and most are going to provide all the micros anyway - as well as what is already contained in your medium.

why not just get a 20 litre pail fill it half full of water and all your vegetable scraps throw in it as it gets full add like 1 litre of hot water keep adding potato skins, carrots , banannas, all greens then grind it all up let it sit a week or so then strain it out wa la you got nutrients ) just remember its goin to be strong nutes
i pt my ppm meter in my pail its well over 2000 ppm

eco enterprises and hydro gardens both offer what you have listed above for a wholesale price. just google eather and order right off the site. hydro gardns also does custom blends suited to your needs.