The "
Jea Capacitors" ebay store has a bunch of different values.
For the MM and Quark, I would get 35v caps, but the capacitance value is a different story. You probably want 3 or 4 smaller (220uF to 330uF) caps to shed heat easier. However, having a bunch of caps clustered around the ESC may be a little messy. But, if you get one, maybe two, larger ones (~1,000uF), it will be easier to mount, but harder to shed the heat.
So, now I'm not sure what value to get. Arggg.
270uF 35v
330uF 35v
390uF 35v
1000uF 35v
1500uF 35v