Make your own Diaper Sprayer.

Supplies needed (you can get them at any hardware store):
3/8" x 3/8" x 3/8" tee
barb splicer
sink sprayer
(2)hose clamps
toilet supply line

1. Shut off water at the valve behind the toilet
2. Remove supply line to toilet from the valve
3. Install 3/8" x 3/8" x 3/8" tee to valve (One end
should behorizontal- the other two are up & down)
4. Take the removed supply line and install it to the
tee- the top of the tee
5. Cut off large end of new toilet supply line
6. Insert the barb splicer (this will connect the
toilet supply line and the sprayer)
7. Put hose clamp on the new toilet supply line
8. Cut off very end of the sink sprayer
9. Install on the other end of the barb splicer
10. Add all of this to the other end of the
3/8"x3/8"x3/8" tee - which is horizontal
11. You are finished. You can buy a hook to hang the
sprayer on the wall.

about $17 total cost

I took these to the local hardware store
and they initially groaned,
but they got really into the project and
essentially made it for me!!
A couple notes I would add is to measure
your pipe to make sure
of the size (mine was different) and add a valve
at the bottom (right
where it Ts with the pipe).
That will keep the sprayer from shooting water
everywhere anytime its bumped.

The valve pushed mine to about $20,
before that it was about $18

(directions borrowed from the gdiaper yahoo group)