Might be worth a shot to call your local hospital and ask if they have an auxiliary. They're usually low key but run by very devoted little ladies who do a lot of lip service to round up donations. Up until fairly recently ours was a little hole in the wall that hardly anyone knew about. Of course they've since moved to main street and everyone knows now but even still, I score every time I go. They have the fun bags and yards rolled up. One of these days I'll post a pic of my stash to illustrate how one can build a stash without ever setting foot into a fabric store.
Still a little unsure what to do with these blocks. They seem rather old and fragile since they were all hand pieced. My DN wants to have a go at them so I'll probably let her do that so she can sharpen her skills.