Welcome, I'm a fairly new member as well, but figure I'll try to start contributing when I can. The big question I see is, why'd you pass on the La Scalas (size, condition, sound, WAF)? That and answering jimbos question should direct you to what you will build, be it either cornwall or cornscala.
The $0.02 answer for the crossovers is you have AA which are for the Khorn, LaScala and Belle, specifically adding protection for the K-77 tweeter. Cornwall crossovers were type B, B-1, or B-2 depending upon year. Just a note, and it's hard to exactly tell from the picture, but the one on top of the fridge looks to have different capacitors of the oil can variety. I'd agree with jimbos recommendation of selling the AAs, assuming your going the cornwall/scala route, and build new crossovers to go with the new speakers.
If it were me, I'd go with the Cornscala D model and source the parts from Crites. Take that with a grain of salt though, cause I haven't built or heard them. I own La Scalas and have heard Cornwalls though, so I do like the idea of merging the two beasts. I'm sure more will chime in.