You can't make a replacement. There is at least one custom konami chip on there so it would require salvaging this custom component and reverse engineering the whole sound chip around it. Its more realistic but infinitely difficult to replace the bad caps.
To be honest guys, those caps will last around 12 years of constant play when the board left the factory. I imagine ops only had the cab on the floor for 6-8 tops and on top of that I gamble the attract sound was off so the audio section was dormant most of the time. Pretty much depends on what board you bought, but on any note in a collector environment it should not be that stressed to the point of the caps failing.