I thought you had ONE L5? And yes, get two 4 ohm dual/or single voice coil L5's and wire them in parallel to your amp. You'll only be underpowering each sub by 50W this way as well.
There's a big difference between getting two DVC 4 ohm subs and two SVC 4 ohm subs. The SVC subs will give you the desired 2 ohm load you need. The DVC will not! If you get the DVC 4 ohms subs, you have to wire at 1 ohm or 4 ohms, and that's not what you need.