I will have some yes. I've recently split a spare wheel, and killed on bolt, I have a wheel that only have 15 bolts as a s**t load snapped, I need one, so will have 14 spare.
I don't know if you need the advice, but if they're being stubborn, and start to round off, they can be saved but you have to be barbaric.
I got 19 bolts out of my donor wheel, one rounded right off. I smashed a bigger torx (not spline) bit in and that rounded off but got a tiny turn, so then I went for it, got a really quite big torx bit (t45 or something silly from memory) smashed it in with a club hammer and then hit it with a buzz gun, it came straight out.
So if they do round off, don't fear too much. If you already know this, I apologise, but thought it may help.
Let me know how you get on with the wheels and I'll sort you out with some bolts if you want? I just need to get together some funds to have the parts of my wheels that need doing refurbed. (two drums, one star).