Here's the capacitor information for the Space Invaders (Midway) PCB. There are a total of 24 caps on this board. 20 are shown below, and there are 4 wet tantalums on the other side of the audio board connector.
Here's an overview shot of the board with the cap locations circled.
There are 2 blue tantalum 22uf 25V caps. These are Digikey part #399-3584-ND. Frys also carries them part #1710818 a.k.a TD22M35. Replacements are yellow.
There are 9 of these green 1.5uf 35V tantalum caps. Digikey part#399-3549-ND. Replacements are yellow colored.
There are 8 of these ceramic disc caps. .10uf 50V Digikey part#478-4281-1-ND.
Just one of this type of ceramic disk cap. I could not find a replacement for it.
Last, but not least, 4 of these wet tantalum caps that can be replacement with electrolytics. Digikey Part#493-1809-ND.