Check peonygarden.com which has a huge selection of peonies and most include the dates of origin, so you could select appropriate types.

This link is an alphabetical list of peonies & gives the date they were hybridized:

http://bloomdate.paeonia.com/alpha.htm

For many of the real old French types you probably will need to order from Canada. You can find the common types in the states but the really old ones seem to be more available up north.