I'm not in front of the game to test, but for regularly refueling a deep space logistics base (and resupply if there is an equivalent to Refuel from Stationary Tankers), I wonder if this would work.
Move the tanker fleet to the base, and issue the base orders to Refuel from Stationary Tankers with a long order delay.
Set the tanker fleet in a loop to refuel at the production point, and move to the base, using a long order delay to make it wait at the base's location.
If the order delays are configured accurately, the fleet should always be in place for the refuel order to succeed, and it wouldn't be a big chore to have to reset the order occasionally if it does miss the tankers.