After doing a ton of hunting on the web - it does seem they are almost impossible to get in the values you need. It is easier to get smaller values, but that would mean more caps would be needed to make up the values, and I don't know if the board has space/solder pads for any more caps.
I did find these - http://www.ebay.co.uk/itm/2-X-RARE-SANYO-OS-CON-2200uF-6-3V-SOLID-CAPACITOR-/261104395484?pt=US_Amplifier_Parts_Components&hash=item3ccb08e4dc
but you would need 9 in circuit to make up the same value as the 3300uf caps......assuming the 3300 caps are all on the same rail.
The 10V 1000uf - http://www.ebay.co.uk/itm/2-Sanyo-SEPF-16V-1000UF-Small-Size-High-Voltage-OS-CON-Aluminum-solid-Capacitor-/300820295550?pt=LH_DefaultDomain_0&hash=item460a496f7e
That would do - and has extra headroom on the voltage.
I couldn't find any 1500's at 16V - but you could use the 1000's if there's room for two extra.
Otherwise I think its a case of going for good quality electrolytics - I don't think polymers are quite there yet in terms of capacitance value.
PS - I forgot to add, I've not checked the lead spacing or size of the caps either - it is worth considering the physical size of the caps too, and if they'll fit in the space provided on the board.Edited by latelesley - 11/30/12 at 10:12pm