Available as an assembled Module and as a DIY project.
This Module is currently available.
1 In to 3 Out Buffered Multiple
Split your signal 3-ways. 1 input, 3 output, fully buffered and a nice dual color led to show activity (green for negative voltages, red for positive ones)
https://www.skullandcircuits.com/utilities-buffered-multiple/
These merchants probably sell this module. Huh?