Quoted from newbieinKC:Great Plains Electronics will sell you a cap set for cheap. Also helpful is that they list what the OEM cap was so you can compare what is on your board.
https://www.greatplainselectronics.com/proddetail.asp?prod=BALLY-STE-KIT
Edit: currently out of stock
Though they're out of kits, Ed still lists all the caps the board uses and which ones he carries and recommends as upgrades or replacements--the link newbieinKC posted has all that info.