I think the answer to your question lies in what you want to use the car for, and also being honest with why you moved from short hoods to long hoods.
Do you want a:
1. Track toy
2. Canyon Cutter
3. Sunday driver
4. Daily Driver
5. Show car
6. . . . . . .
And what lead you to long hoods?
1. Was it just the feel of a light car with the quick throttle response and sound of MFI or carburators?
Or
2. Was it the look and feel of long hoods.
- I am not faulting you if it is both, just if it is both it is difficult to get that in an SC. If you just want the feel than something like Noah's car could be right up you alley.
Here is a good link to a lot of places to find P-cars:
http://www.rallystuff.com/pcar_sources.html
Also check PCA classifieds for idividual regions. Each region has its own web site, a lot of times cars show up on the regional web site and not on the general at large PCA website. I have seen some really nice long hoods in the Denver PCA classifieds, some down in Texas, etc. I would stay away from east coast longhoods unless you have a keen eye for rust. Ask some of the shops around too. Somebody like TRE in California, or Steve Weneir up in Oregon might know of some cars that are looking for new homes.