Need Inexpensive Crossover


I'm using Monitor Audio GR-10 bookselves and a Klipsch powered subwoofer. Right now I'm running them both full range - and using the low pass on the crossover to have it kick in at about 80hz.

What I want to do is to roll off the low end on the bookshelves - as the bass sounds a bit too muddy at higher volumes (and just send the higher frequencies to the bookshelves - say above 80hz)...... and then just send the low frequencies (that aren't being sent to the bookshelves) to the sub (and probably not use the subs lowpass filter at all).

I know that crossovers can get to be pretty pricey, as all high end audio can. However, right now I'm a bit tapped out on the high end audio budget... and need something that will do for the moment - maybe I can upgrade lower.

Do I need something that has both a lowpass (for the sub) filter and a highpass (for the bookshelves) filter. Can one crossover unit combine this, or do I need 2?

I'm looking at spending no more than $100.

Is this possible?

thanks for the help (in advance)
zenguy
The X30 is very good,  although the ICBM is much better even if you only use the front two channels......I had both and I regret selling the ICBM.   
Those paradigm x30 are handy and sound pretty good. At a point I had 2 of them. 

When they say mini they arent kidding. If you can find these used grab one, used in the neighborhood of $100 or less https://www.minidsp.com/products/minidsp-in-a-box/minidsp-2x4
Sub already get  built  in low pass crossover, for bookshelf you
need 2 or 3rd  order high pass crossover with cross point about 100 hz
 it can be custom made using big induction coil.  The price for one
can be 50-60 each