Years ago, I rode a non-electric version of a HP Velotechnik Scorpion, similar to the one @Ravi Kempaiah linked. It’s a very nice trike. I hear the electric version is great, but US support is mediocre. When you said “high-end”, that’s the first thing that popped into my mind.
I’m almost finished converting my first tadpole. It’s not high-end, so it’s probably not right for you. I’ve only tested it in the parking lot, but so far, it’s a blast! Good luck finding a trike that brings you joy!