Anyone can help me with silverfish?

[Miles_Sunhede]

So one of the requirements to level to 28 is killing 500 silverfish and right now I'm banned and even when I'm banned its going to be hard to find silverfish. If anyone have any tips on finding silverfish or have a spawner. Or spawner location I would much appreciate if you want payment for information I don't mind.

 

[PartumCreed]

Here's a horrible 'tutorial'.

Supposedly you can find Silverfish in strongholds. I advise strip mining, when I do so I come across them very often.