Find the Lucifer antidote?!

In SD Snatcher, after speaking with Elijah Madnar, you have to find the

antidote to the Lucifer virus by killing the snatcher carrying it. I have

fought every single snatcher I came across (actually, I ran from most of

them, since they can kill you in one hit) and none of them had the antidote.

Plenty of the red tubes, but no yellow ones. Could someone please tell me

which room he is in, and I should be able to find him from there. Is he

the one boxed in by the conveyor belts? If so, how do I get to him?

Thanks.

You have to go to the part where the scienttists are. Talk to them and walk beyond. There are some (Nuclear) submarines where you at first can't seem to get past, but after you hear a sound like a foghorn a boat has docked. I believe you are already past this point. But you have to go back to that point in the game, because you have to go talk to one of the scientists who is in the room north of the underground docks.
He'll tell you that the antidote has been stolen. From then on you can find 'Naked Snatchers' with Yellow Viles; destroy the Snatcher (not the Vile) and you get L-Angel)

If your Level is Low, use a Circuit Killer!

Actually, the problem I have is that I can't find a snatcher with the L-

angels antidote (that's the yellow tube). The only snatchers I have found

are all carrying red tubes, or nothing. Where can I find one with the

antidote? BTW, I'm using the MSX emulator, and my max hit points are

stuck at 51 points (the result of some sort of cracking error), which is why

the snatchers can easily kill me.