A good source for cases in UK is Christian from GWAcrylic.
Have a few of his cases and in my opinion they are better than the AFA cases.
The rails which hold the MOC in place have a curved lip on them, and are designed to not scratch the card when inserting or removing from the case.
They are made by a collector for collectors.
His prices are good too.
http://www.imperialgunneryforum.com/t2140-gw-acrylic-moc-loose-figs-cases-new-acrylic-display-steps
This is also a great thread for inserting or removing a MOC into acrylic cases without causing any damage to the card.
http://forum.rebelscum.com/t1098069/
Just my 2 cents.