As far as I'm aware McGuard don't do wobblys unfortunately.
They are not just made for fiat's, so you need get the bolt spec correct, ie. thread, taper,length etc. They will no doubt ask you which car it is for, so they should be able to dtermine which ones you need (though they still got the thread length wrong when I ordered mine). You'll need 12 wobblys of course, and a set of 4 lockers, but depending on the area you live in, you might want to opt for two sets of lockers! Oh and the alloys you are putting on may be different depths to the std ones. So you may need to compare this too to your thread lengths. I know someone who put their std alloys back on using bolts bought for the aftermarket alloys, and their bolst weren't long enough to take the strain, and the wheel came off going round a corner!!