A few people have asked me about an overlay for Beluga Dreams. I decided to go ahead and make one. It can be downloaded here. You can use it in an emulator, print one out yourself, or pay someone who knows what they are doing to print it for you.
I purchased this one from Kray Kray overlays on Vectrex Fans Unite (Steven Kray on Facebook). You can also see the various overlays he has up for sale on eBay.
This is what it looks like in an emulator:
I might make a box next if there is interest.