A 18-20mm tweeter is the difficult part.
JBL and infinity have a few options granted they will likely be light on the lower midbass.
Rearfill personally I don't do as to be done right they need to be cuts quite a bit output wise and time aligned which adds more complexity. But if you are just looking for output and 5.25 coaxial will work.
Audio frog makes a gs10 that should fit the tweeter option but it's likely too expensive. The gs65 and stereo integrity tm65mkiv pair nicely but again quite expensive and no crossover boxes which increases complexity.
In this case I really think
crutchfield.com is a good place to do some research if not buy