Further to the posting Quiet solar radio flux interpolations calculator…
With a change in hosting and the changes to adapt to supported and unsupported features, one of the positives is that the ‘short term’ fetching of data on which Quiet solar radio flux interpolations calculator is based is now happening two hourly at 5 minutes past the even hours.
If you wish, you could email SWPC.Webmaster@noaa.gov thanking them for their service and encouraging them to restore the rad.txt and 45day_rad.txt files to HTTP access quickly.