Funnily enough, I do have that tune tagged as Sakai :P I thought so too, but considering most of the other songs sound like Ishikawa it seemed unlikely he would participate in the game for like one song... But who knows really.
The other one sounds like Ishikawa to me, but of course I'm not really sure. I don't know Ikegami's music well... I would take your word for it if you're certain.
Anyway here's what I have for Air Ride atm. Confident about some but not others. The orchestral songs are less easy for me, and as always, jingles give you very little to go on. Also have no idea if you guys have the same song titles as I do.