The Micro SkiGull by Burt Rutan is here. This model has a 720mm wingspand and a 113g take-off weight making it a take anywhwere, fly anywhere model. The model should be printed in LW-PLA.
This micro model is a little tricky to assemble ans so may require some modelling experience - see the free downloadable Manual for more info on the SkiGull page here.
The Micro SkiGull is also a perfect candidate for upscalling in CURA.
Due to the cost of UMX electronics I cant suggest you use your Micro SkiGull on water.