This one, VANKYO Leisure 510, is much cheaper and seems to have excellent reviews. Not a "in the palm of your hand size", but that means it probably can run cooler as well:

https://www.amazon.co.uk/VANKYO-Leisure-Projector-Projection-Carrying/dp/B07GWSGW5H/ref=sr_1_2

Link above is for the UK; look on Amazon.ca or Amazon.com for reviews.