Not sure what you are asking? Cheap pink foam 2" thick 2x8' cut in to 2x2 square taped together makes a cheap target? Just ducktap together...
I have repaired old 3d targets by either injecting caulking into the holes and letting cure. requires a lot of time and a heat lamp... hard to pull arrows if the target is REALLY shot up...
If the center sections is really shot up i have taken "Great Stuff" expandable foam and use it to "repair" the target. Its hard to make it work really good but you need a way to contain the foam as it expands so that it seaks out all the shot up crevasses. I have done this with limited sucess using saran wrap. I think there are better ways of doing it but that requires almost as much effort as earning the $$$ for a new target... I have "repaired" some to use a moving targets so that people are not necessarly hitting the X, as it doens't hold us as well and is hard to pull arrows.
Does that answer your???