The Meguiars yellow pads are nice but for the interior I use dish washing pads, these are also useful for tyres and exterior plastic moldings: cheap to buy and you can just bin them once they are used.
As for MF towels, the best ones I have found can only be bought online but it is worth checking household stores as well as the motor shops
Just order from Alex at Serious Performance... His MF towels are just superb and they have also passed the CD test....He also stock all Megs gear and some of the stuff our Yank freinds use like P21S, Poorboys, Cleakote etc..
I live in the US and when I hear a guy from the Uk say "yank" I assume he means north american. I think that if I heard him say "yanker" that would be different, but, really, he'd probably say "wanker".