OptiCell bulb upgrade... LED?
 

Hi guys,

I would like to upgrade my Opticell's brightness -- I found this site:

SKjagtech - Jaguar new & used parts, servicing and support for all models.

It says that the OptiCell (which illuminates the climate control knobs, etc.) can be upgraded. I found another site:

Jaguar XJS LED Upgrades and Conversions

They sell the bulbs, but they are 16 bucks a bulb! Is there another bulb that can be used in place? Does anyone have a write up, an FAQ or a part number I can use in place?

Thanks!