I had my classic mini flap stolen with my card holder inside just last week too! Thieves were brazen, they stole this from right under my nose at the airport where there is supposedly heavy security and police presence - obviously they didn't care.
Unfortunately, I didn't have either items insured so there was nothing more that I could do in terms of recouping the losses. I did file a police report but there were no cameras at the boarding gates where it happened so police don't want to pursue this any further.
Everyday since this incident, I've been on Ebay and the local classifieds hoping that someone will be stupid enough to list them as I still have the boxes, dust bag and authenticity cards so I could identify them via the serial numbers.
Having been through the same thing, I feel you. Hope there is somewhat of a positive outcome!