I used the 4.7uf SA's from Madisound, they're 45.6mm long so they just barely fit, though you won't be able to sit them flush with the board as the cap itself rests against the leads. You can see the size in my picture a couple of posts up.
Kevin, thanks, I got those after I noticed nothing was coming out from the jack. I'm just full of fail today.
It's playing music now and it sounds great