So cheap vented rev-like 1.5 quads seems to be what you are looking for.
I don’t know the shipping cost + tax, but if you are considering Freilein kites (Windrider) you could try Emmakites (Beijing/Hongkong).
You can get a vented Rev-like quad ("baSic small vents ", "baSic vents ", "baSic big vents ") from Feine-Drachen for 139 EUR and RTF for 209 EUR (Skyshark wrapped spars, sails in nylon or polyester ripstop it seems like). Never seen one myself but on Drachenforum there is a 33 pages long discussion ( baSic / feine-drachen / Erfahrungs Thread) about them.
A Spiderkites Shiva Midvent seems to be a few cm larger than the 1.5 form factor. Same price as the Basic RTF. I have never seen the Shiva but I have liked all Christoph Fokken (the designer of (all?) Spiderkites designed kites) kites that I got (5-6 models with the possible exception being the non-beginner dual line Atrax, but I’m not good at pure speedkites). Don't listen to me - Talk/listen to to someone that has actually piloted a Shiva.