A question about a Keris

[simatua]

Hi guys, about the arsenic thing...where to find them?Tried to search at D.I.Y shop they don't know a thing.

Because its a poison its very hard to find indeed. You could try a different way: At a mineral / stones selling (saw it lately on ebay too): buy Realgar ; This(orange colored) Mineral stone contains arsenic. You have to pulverice it and make a mix with lemon juice.
Patience is needed, cause you 'll have to wait for about a month to let the arsenic kristalise with the lemon.
The mixture needs the sun as kathalysator; A nice sunny day.

...Always be carefull, only use outdoor, with protection of gloves and something for your mouth.