I bought a Rikon Grinder a couple years ago. The LED bulb in the flexible neck lamp has gone bad. I am having trouble finding a replacement bulb. The threads on the bulb base seems to be something non-standard in the US. I've been to several stores like Batteries Plus Bulbs with no luck. So far, the place where I bought it has not come through with any info. Can anyone identify a replacement bulb or what the bulb base threads are called, so I can search on the internet?