#2 in the series is the 1968 Mazda Cosmo.
#3 - KGC10 Nissan Skyline GT-R Hakosuka
#4 - NA1 Honda NSX
Those are all the ones currently available as a "test run" to see how well they sell. If they sell well enough, they will release the next batch:
- BNR32 Nissan Skyline GT-R
- Isuzu Bellet
- AE86 Toyota Sprinter Trueno
- SA22 Mazda RX-7
- Toyota 2000GT
- S30 Nissan Fairlady Z 'G-nose'
- KGC110 Nissan Skyline GT-R Kenmeri
For the current batch I'd say they're pretty much sold out, but will check later today. The sales test run is only held in two bookstores in Japan, one in Kansai, one in Kanto. As such there's no official website update (yet).