How about Online Flight Planner? http://onlineflightplanner.org/
It allows various export options (FSX, X-Plane, PMDG, etc) and the user can select a specific AIRAC cycle (from most current all the way back to cycle 0511). It uses Route Finder for the routing, includes WX and fuel also.
There's also http://simroutes.com -but it appears to load an error page at present.
Either/both are easily integrated into phpVMS by editing and renaming the Route Finder module.