TU56 lamp replacement

Hi folks, I'm currently checking out some TU56 DECTape drives. Stuck motors, burnt electronics, dirt, and other issues usually come my way. And broken indicator lights. Does anybody have experience replacing those bulbs? Originally there are those white plastic blocks that should be replaced as one piece. Nice idea - I have ONE complete replacement and at least 6 to repair. Those blocks are easily opened, fiddling a new lamp inside is easy and no problem. So what I ask you is only for ideas about the right lamps to use. It should look similar to the original lamps (or could be a bit brighter). Some blasphemy to add: If I don't find a quick solution, I'll fit one of the TU56s with crazy colored LEDs. That might be considered a sacrilege by some people, but it's quite reversible and non-destructive. I have LEDs in two RK05 drives, too (They're soldered to their series resistors and plugged in like the original lamps, so everything can be reverted instantly). The read and write indicators are quite more interesting that way (with incandescent lamps you don't even see many accesses!). But at the moment the question is for incandescent lamps. So please share your ideas/experience with me! Best wishes, Philipp :-)