Get "rendered" Form variables only for a task

I am trying to get the form variables I declared in the BPMN designer, for a particular task.
One option is to use: GET /task/{id}/rendered-form and parse out the HTML, but it would be nice if there was a direct call.

I tried:

GET /task/{id}/form-variables

This gives me all the variables in scope (some actually from the last task that passed thru the gateway). Is there any call to simply get the variables that exclusively belong to a task?
(I also tried /localVariables, got nothing).