I was told by Griffin that the novak one is a 25volt cap and you need 35volt cap that is rated between 2200 to 3300uf.You can get the cap you need from digikey.com
The novak is 25v which is fine for 4s and a little tight for 5s (mine runs ok on 5s) - 35v would give you more headroom but make sure you get a high temp low esr cap
We no longer use individual caps on our BL controllers. We have switched over exclusively to the TransCap modules. We do offer some of the earlier caps here: