You could use those Phoenix Gold speakers for this. You would need to contact the manufacturer and get the T/S parameters for the woof so you can design the cab appropriately (or ask one of us to model one for you).
One thing, however, is that with the larger woof and a flush mounted tweet I expect there to be a directivity mis-match between the drivers, which would give less than optimal off axis response.
Also, you don't want to add an intermediate size midrange to them, as that would necessitate an entirely new crossover.
I think you may be underistimating the complexity of speaker design a bit, but we all started somewhere. Stay curious, consider a copy of Vance Dickason's book on speaker design. Or just go with a kit (such as the Mini Statements you linked)