I'm creating a character in Dark Heresy 1e, and I've managed to find the cost of Integrated Weapons, the tool(s) I want, as well as the requirements I need for them, but I can't find any guidelines for integrated tools.
An example of something I want is an an Integrated stim injector. I want it to be concealable, not something as obvious as a medicae mechadendrite.
I have all the rulebooks, so where can I find the rules/guidelines to create an integrated tool?