Any recommendations on front wheel hub e-bike conversions...
Don't.
If you live somewhere very flat, with no hills, and not much in the way of slick conditions, OK, you can find a 250W kit and put it on the front. You ruin the handling and the bike is weirdly twitchy, but it probably won't kill you.
Any hills, any rain, any slick conditions, or a desire for more than a gentle assist, and
do not do this. You'll kill yourself. A higher power output on the front wheel makes the steering really darty, does odd things to the front geometry, and if it's slick at all, the front wheel is prone to spin up with no warning at all. A spinning rear wheel on a bike is mostly fine for short periods of time, and you can ride through it until you get traction back. Spin the front up with no warning and you'll do well to remain on the bike at all. It's a wonderful way to be departing from the bike wondering what just happened.
Power the rear wheel. Either a rear hub motor, or if you're dealing with a cargo bike or steep hills, a mid-drive. You get a
far better bike out of the arrangement that isn't waiting for a slick patch of ice to kill you.