After Microsoft moved the MP Catalogue to PinPoint (or PainPoint as I called it) it was incredibly difficult to find MPs. The site has been revamped allowing you to filter by product (OpsMgr, ConfigMgr etc) instead of all lumped together. Then you can filter by company that made the MP and also sort by release date or name. Brilliant. We are back where we started.
The link is here http://pinpoint.microsoft.com/en-US/systemcenter.