In order to shield the Insignia speakers do the following:
1) Order these
2) get a "Torx 15" driver.
3) get a hot glue gun.
4) take the grill off the speaker
5) remove the piano black baffle with the torx 15 driver (note: the baffle is also attached with some glue, so be careful when prying it off.
6) unscrew the driver with a phillips head screw driver.
7) remove the driver and flip it over to rest on the speaker cabinet. Be careful not to damage any of the wire connections.
8) apply some glue from the glue gun to the magnet located inside the shielding cup.
9) cover the back of the driver with the shielding cup so that the magnets glue together. Be very careful to center the sheilding cup over the driver. This can be done by aligning the hole in the shielding cup with the small circle on the back of the driver.
10) let glue dry for a couple of minutes. Note that hot glue gun glue dries quickly, but is not the strongest of bonds. I found this useful for breaking the seal and realigning if necessary, but some might want a stronger bond. I felt this was strong enough for the purpose, however.
11) reattach the driver to the speaker cabinet, once again being mindful of the wires.
12) reattached the baffle over the driver. I used a little hot glue here too in order to prevent any rattle from the baffle during use. I don't know if this was necessary, but I felt that it couldn't hurt.
Overall the speakers look exactly like stock, but now do not interfere with the performance of the CRT TV.