I have been building low-z pickups from wall-wart wire, machine screws, nuts and slices of hardwood from an old surgical drill. I did a blog: https://cigarboxnation.com/profiles/blogs/pickup-winding-troglodyte... on how I make them. I since made one from some 42 AWG that a member graciously gave me, but I had some problems with the thinner wire and had to set it aside for other projects for now. There are also a couple of sound files on my profile page in "Videos". if you like.
Magnets; I have used old computer hard drive magnets with good results. Neodymium button magnets work fairly well as well as some ceramics.
Tuning pegs: Have used eyebolts with good results. They can be more work, but I haven't had as much trouble with them as some people have.
Let me know if you have any questions. I have tons of guesses.
I have made home made zither pins by hammering the end of a nail flat and putting a small hole in it. Pre drill a pilot hole smaller than the diameter of the nail and hammer it in.
Thanks for the tips, guys! I have a bunch of old nails and a good old 35 year old Buck Stockman that will chew through a piece of hardwood pretty well...
Thanks for those tips on tone, IG!