I can't seem to find the stud things that retain the brake discs in place,and help place the wheel before tightening wheel bolts,anyone help?My front four have been broken off by previous owners

Fiat dealer, got a couple there a few months back. Had to be ordered in.

i got them off ebay, partsworld-uk, part number 4221815. i cut a few threads off btw

I have a few secondhand ones in stock

Are these even needed?

Strictly, no, but they both serve to locate the disc, and to locate the wheel when refitting. Without, they're tricky to fit.

I don't have them and refitted the disc at 90 degrees to it's correct position. This gave me very spongy breaks.

Removed the disc and lined up with the correct holes, and this cured the spongy breaks.

Just a bit of a heads up for anyone I guess.

w'hoa!

that's certainly worth knowing...

That... makes me wonder how, since everything should be flat.

However - if the stud has broken off close to the hub, as many have, with just a bit sticking out, then it is imperative that the disc be replaced with the holes over the stub. Otherwise, the pressure of the stub can deform the disc when the wheel is tightened over it. In my case it led to knocking brakes (and new discs to cure it) but I suspect that a smaller sticky-out bit might just increase the runout and push the brakes back into the callipers.

I think instead of the studs I have what I would describe as blanking nipples with a slight raise from the surface.

Then you need to make sure they align with the holes.

Aye, only realised this when I had my spongy brakes!

The one time I did it, when I took the disc off it had dimpled and cracked under the pressure.

I've got a few spare. Ping me your address and I will stick them in the post.