Mike,
I am not familiar with the charger but I do have a suggestion regarding the bulbs, that is, if you can't find replacements.
If they are bad, you could sacrifice the glass and filament with a set of pliers or other implement of destruction.
Then, a LED and resistor could be soldered back into the screw base.
Once the cap is back on the indicator, it would probably look about the same.
-Albert
KI4ORI
