Hi andrea.
I've not tried Carefresh but I did buy a huuuuge bag of Megazorb when I first got the boars.
Personally, I didn't find any advantage (though I can appreciate it's excellent for indoor Super Furries)
It's a massive bag to store.(I've got two new plastic dustbins with the locking lids to keep their hay and straw dry beside their Pighouse)
I bought it from Farmway online (it's an equine bedding IRL, just been poached for the fur baby community) 
Can't remember how much it was but you have to factor in P&P. They did a special offer of Free P&P over £35 but under a specified weight. 2 bags was over this weight though.
I put it in the corners of the boys haybox. They decided not to pee in the corners 
It sticks to fleece if you use this.
I use catlitter under newspaper (Catsan under the newspaper when they were in the living room. Now they have small animal friendly wood pellets)
It's dust free but very fine, so it does tend to get everywhere .
AFAIK, carefresh is very similar. Maybe try a small bag of Carefresh and see if you like it, then see if there's a Saddlery near you that stocks it?
I don't know if Farmways does small animal products now. It seems to be Equine/Farm. So you'd probably have to buy in bulk.