Leaky capacitors need replacement?

Definitely.

I cannot quite see from the picture if they are polarized or not. But it looks like they are polarized by the little black band on the side indicating the negative terminal, but I cannot be sure. Please check.

But not to worry either way, if they are bi polar (non polar), you can always put two 68uF (standard capacitance value) back to back in series and it would do perfectly, which would give you 34uF and with the +/- 20% tolerances it would not matter.

Do NOT buy another direct bipolar capacitor because their lifetime is VERY limited.

Here are your options (I increased your voltage to 450V for even longer life).

If your capacitor is polar:
https://www.digikey.com/en/products/filter/aluminum-electrolytic-capacitors/58?s=N4IgjCBcoOwEwFYqgMZ...
Note that these are VERY long life capacitors (20,000 hrs at 105C)

If it is bipolar, you need two of these back to back (- to - or + to +).  The good thing with back to back capacitors is that their voltage will double to 900 volts in this case.  They will obviously occupy more space however:
https://www.digikey.com/en/products/filter/aluminum-electrolytic-capacitors/58?s=N4IgjCBcoOwEwFYqgMZ...
These are also very long life too (20,000/12,000 hrs at 105C).

They will last a looooong time.

ALWAYS!!!!!!!!!!!!!!!!!

Replace the capacitors. Be careful though there may be other components affected by the leaky caps.  An O Scope will help to see if the signal looks clean.

Those are polarized capacitors and should be replaced with the same type and value. Film won't fit! Non-polars won't fit either.