I have two of these which annoyingly have died on me recently. One is Radiospares labeled and has the solder tags on the end, the other is the type that looks identical but isn't Radiospares labeled (no label) and has hardwired leads. There is some debate about whether the latter was ever originally used by Marshall, but my clone doesn't care about that...only that it looks right and it wants the indicator bulb to work! Is there any way to change the bulb in these? They are becoming hard to find.