Question about Artemide Tito 35

I've had this lamp and a couple just like it for years. Great lamp when you could use the halogen bulbs it was originally designed for. Since removing halogen bulbs from the market and having to use LED bulbs, I haven't been able to find an LED bulb that provides the equivalent brightness or the ability to switch between the two brightness levels. The LED bulbs are much larger, so you have to remove the glass and "cram" the largest LED bulb that will fit the lamp bulb enclosure into the pin slots. That largest bulb is not as bright. Will probably replace the lamp because of this. Perhaps newer lamps are designed differently to use the newer LED bulbs?