Source for Wonder Caps?

Wonder was a TRT brand of capacitor. I don't think they are made any longer, however TRT still makes the StealthCap and DynamiCap, if you want to keep it in the family.

Honestly, any cap of the same value should/will work appropriately.
If I were to suggest a fix, and all 3 of these are in parallel with each other, I would ditch the Solen and get a large Audyn Q4 or Clarity PX 50-55uF cap. The Solens tend to sound gritty, and these won't. Then use your pick of Jantzen Zcap to finish the other 2 values.
If the Solen is across the woofers running solo, this is a fine application for them, leave them alone.
 
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