I poked around on a few markets to no avail. Im looking fuming nitric acid at concentrations above 80%. 98% would be ideal. If you kind people could point me in the right direction it would be much appreciated.
Thanks for the help <3
Edit: Looking to buy, not make
With some basic equipment, it is fairly easy to make this stuff yourself from OTC products.
Distilling sulfuric acid based drain cleaner mixed 2:1 (mole ratio) with a potassium nitrate based tree stump remover will afford you ~60% red fuming nitric acid. Making a second pass with some additional sulfuric under vacuum will get you to >90% white fuming nitric.