Hi!
Best free plugin IMO is this New free plugin (9 march/20) - Orchestra! Refer to inside repeating groups cell(s) from outside
The next best way to do it is with another awesome sauce free plugin List Shifter: Reverse, Rotate, Swap and ITERATE (Loop) Over Bubble Lists | Now at v1.4: Adds Numeric Option, GET INDEX Action
Both can do what u want but i find Orchestra to be easier to work with when building workflows. @keith Love your plugin too man!