You're missing my point: What is so special that it NEEDS to be put back into production? Just because it isn't and you like it? Well pre-Blackout that isn't going to cut it, and post-Blackout things are going to be so upset that bringing it back would be hard,
You are missing my point: I never stated that this particular design really needs to be put back into production. I can't even say that I particularly like it.
The original question was about bringing back to life a design that is out of production by a small company. If you think about such setting, then you will probably conclude that the era in which such a thing could happen is either Civil War-Jihad, or post-Blackout. In other eras you either have problems with producing any battlemech technology in general (Succession Wars), have to race against bigger companies that do exactly the same (Invasion) or have a global disarmament (post-Jihad). During Jihad and post-Blackout, any military is hungry for equipment, and you have a chance.
But the problem is to find a reasonable design that is out of production, and better without turning to exotics like
Rampage and
Alfar. I have not checked all the sources on 'Mech production, but may designs I thought were extinct appeared to be at least used by some factions during Dark Age, according to MUL. This does not automatically mean that they are also in production.
Hoplite is a cheap rugged gunboat, which can be produced with low-tech chassis and modern weapons, which brings costs lower. Heavier 4/6 'Mechs have more space for weapons, but they are both more expensive and probably produced by some other company. Anyway,
Hoplite is not a suitable example, because General Motors owns the rights for it.
Maybe you can suggest some design that would suit the requirements.