I have one like this sitting on my tool box: FPS Audi A4 A6 VW Jetta Passat Fuel Pressure Thrust Sensor 06E906051K | eBay
These will both will meet your requirements, are 0-5v, and will handle well over 4 bar, check your local audi/vw dealer there is one on every TSI/TFSI(direct injection) engine, and the tech are always throwing these things out. There is an issue with them causing a check engine light but I feel most are replaced for no reason. Talk to the techs, a quick explanation of what you are doing and maybe a $20 bill will likely net you one.