Mike,Tough cars to find right now. I am tryng for a bit over 2 years to find the right car in the US. Most cars are in Europe and most are red. This is probably your best bet if you want one fast (But do all the required dilligence and budget another 10 - 20% of the asking price to make them right).
Good US cars seem to have completely dried up. I tried all the sources above and put several ads in the AROC magazine with no real results (Maybe one, but I will not tell you ). A good way in my opinion is to know the excellent SS's you want and stay really close to the owners ... and wait and make sure the check book is ready once they decide to sell (This seems to work for another rare Alfa that I am working on really hard right now ...)
Keep looking. It can take while but it will be fun,
Mark,All the cars for sale "kinda" look nice but have lots of signs of needs. For some that might not be much, for some it might be a lot. There is always a handful of the cars on the market in that condition.