found 4 wrenches in 6 weeks, so it is possible. the black smith hammer can be crafted in the advanced forge. you get the recipe, for that and the anvil if u buy the advanced forge perk.
as a hint. just typ the name of the item you are looking for, anythere in the stations or your inventory. if there is a recipe you will find it. if not, the item is just lootable.
as far as i remember correctly. you have to find the frying pan, the tendizer, the wrench (yes its craftable, but we all know you need it before you can craft it), the sewing kit, the wielding torch, the tool kit, and last but not least the all loved calliper.
frying pan and tendizer = nice to have but not elemantal
wrench = don't need to talk about
sewing kit and welding torch = a pain in the ... , but you can find or buy armor
tool kit = not really nessacary, just usefull for a big badabumm
calliper = very usefull and hard to find sometimes, but more lategame relevant