Are you sure those were Mica Caps?
Micas rarely need replaced, you should also replace Mica with Mica, not Film Caps and never use a lower voltage that what was in there.
Some caps that look like Mica aren't really, there's a way to tell by the color coding but I'd have to Google to find the chart.
Pretty sure the AES chart is a misprint, a 2.2 Mf 2000 volt Ceramic would be huge, you also don't want to use Ceramics to replace Film or Paper Caps in most applications.
2200Pf would only be 0.0022 Mf
Here's a Pf to Mf converter, it works both directions actually.
http://www.convertunits.com/from/mic...d/to/picofarad