Look for solvent section in the hardware store, read labels, also when you get home look up "brandname MSDS" in google, and let us know what you can find so we can advise you. Also in bigger cities there could be chemical/lab supply stores.
Nafta, hexano, heptano, solvente alifático, etc, words like these are what you should be looking for.
Or for the other chemicals, lye would be Soda Caustica, or Hidróxido de Sódio.. It could be in the cleaning aisle of supermarkets or hardware stores. Lye is alse used sometimes for olive conserving.
If you want to do the dry teks you would use Hidróxido de Calcio as a base.