LOL, I have been trying to resist replying to this thread for ~2 weeks now ....
People are probably sick to death of this ol' record .... but, I'm still searching for Lunar Lander on Steroids and Choplifter 1987.
I was going to link to old threads here, but they are gone ....
So, I have linked to PDFs of 2 threads I started about these games over at Aussie Arcade Forums. (I have linked to PDFs of the threads to save people having to create an account and register at Aussie Arcade - which you have to do before you can read anything).
I very nearly released a simulator for Lunar Lander on Steroids about 3 years ago (?) .... got the vector landscape scrolling exactly as I remember it, etc, just had to finish the ship crashing explosions (vector destruction), and a few other bits and pieces. But then stuff IRL hit me .... *Cough* cancer *cough*
Anyway, I'm still searching for these 2 .... These 2 are very much my holy grails for dumping, preservation and emulation.