Nikkey,
I was a Cressi-sub dealer for over 20 years, and have fitted many women. It will not be easy to do without an onsite stocking dealer.
Ladies, if barefoot, usually have to go with a size under the shoe size listed by the manufacturer, because they only make men's sizes, which are: 7-8, 8-9, 10-11, 12-13.
My wife has a medium to wide 8.5 foot, and just barely fits the 8-9 Cressi Garas fins, with 2mm neoprene socks.
You live in BC, so that also means you'll need more insulation than we do down in Florida. I'm guessing 5mm socks minimum?
So what do you do if your foot is less than a size 7? Many women here down to a size 5 or so, wear a 3.5mm hard sole booties, and the sole helps fill out the fins. The boot is harder to get on and off, but many would just slide their foot out of the boot.
And then there is the fin flexibility to match to your leg and ankle strength.
I have not kicked the 3000 LDs, but flexed the fins and I can tell they will be a good performers for average to athletic divers, especially in cold water. I had the 3000 HF (now called just 3000) for almost a year, and found them just a bit too stiff compared to the 2000 HF fins that I have used for years. I've gone back to 2000 HFs. (The Cressi descriptions were wrong about the 2000 HF being stiffer than the 3000 HF.)
http://cressisub.it/intro.php?lang=us&id_catalogo=1&id_categoria=14
My best recommendation would be to find a dealer, even online, that would allow you to try them in a pool and exchange them if necessary, as long as you do not scuff them.
We sold Akona socks and boots that worked well with them, but I have not found a good pair of 5mm socks. Let me know if you find some.
http://www.akona.com/
Chad