I was also planning to buy the Vevor spindle that @Jonathjon recommended, but unfortunately, it seems to be unavailable. I’ve contacted Vevor several times, and every time I got the same response—there is no restock planned.
There are various other 1.5kW Chinese alternatives out there, but other spindles have also been recommended, such as:
Personally, I have considered these as other reasonable options (though they are not tested solutions):