[BrianG]

At the Digikey site, scroll down to "Capacitors" (of course), and select "Aluminum".

Then, select your filters:

- 3300µF
- 6.3v
- "through hole" mounting type
- Up to 105ºC rating (to select multiple options, click on one item, then hold the Ctrl key while selecting the others)

Click the "Apply Filter" button.

If the list is still too long for you, you can narrow it further by selecting acceptable physical sizes you can use.