Im thinking this should work.

250uF 100V Non-Polarized Capacitor | 027-370

Here is another.

220uF 100V Non-Polarized Capacitor | 027-368

First one is 250uf (i think allows more bass to come through) than the 220uf. If I am not mistaken, the bass turns off completely at 180uf if I have read correctly. So the higher the uf the less bass taken away. Someone correct me if I am wrong. I think I am going to order the 250s. 270s are said to be optimum accd to the 27 pages of thread.