In case you haven’t already seen it, you can use a Chinon FB-354 as found in A500s and solder some wires and a resistor to the PCB for the LED. The downsides I found to this are 1. Things like the Spirit RAM expansions no longer fit due to the Chinon drives being longer than the originals, and 2. In my case the drive carrier mechanism fouled the front panel of the 1000 so a round file was needed to extend the mounting holes in the drive cage backwards by a couple of mm.