Navigraph offers an inexpensive option which only includes AIRAC cycles. It can be used to update MSFS, Simbrief and Little Nav Map to keep everything in sync. Then you can get your charts from Chartfox or Simviation. You can plan your flight in LNM and transfer it to Simbrief and then to the FMS. Or you can do it the other way, Simbrief to LNM. Then export the LNM plan to a .pln file and load it to MSFS. Now all is in agreement (until ATC changes it). The next update to LNM will include an export to Simbrief option.