Why does it have to be that hard to do? https://www.jkllamps.com/incandescent/axialleadlamps
Look for DA513 and you will be there. I use them all the time in many kinds of decks except the Technics that use a 6V lamp. They supply about 5 V to the lamps.
Yes, There are E bay lamps being sold for $21 for 4 $1.00 lamps but I prefer not to be ripped off.
You don't need to buy old used lamps that some one took off another machine. Get new.