Look at each electrolytic capacitor and write down the existing values and location to make up your own kit. Then you order those capacitors.
Bob Roberts sells individual capacitors. The cap kits he sells are made up from lists that people have provided him over the years.
By the way, when you look at the chassis to write down the capacitor values, be sure to note if there is any polarity errors in the silkscreened markings on the board. Some chassis like Hantarex are known to have some polarity markings silkscreened incorrectly.