As far as a 3-d target holding up to broadheads over extended use,I don' t think that there is one.Maybe a Mckensie HD but you would be worn out from trying to pull arrows because they will lock up in the targets and will require some type of lube.Really not something I like to do with an arrow that I use for hunting.Really don' t need the scent.
Rinehart makes the best 3-d target imo but I don' t think they will hold up to broadheads for very long.Atleast they have replacable midsections but they are extremely expensive.I would stick to shooting the 3-d targets with field points and get something else for broadheads.
Rinehart makes the Rhino block that looks like it will do a better job as far as holding up is concerned.It is expensive though.Over $100.00 but it might be worth it.Check it out.
www.rinehart3-d.com/targets10.html