You're probably out of luck -- Some companies make adapters to access PCI devices from a PCIe slot, but seldom the other way around.

Best bet is a PCIe carrier card for the mini-PCIe flash drive, which could then plug into a PCIe slot in a desktop/tower PC. Similar to the PCI one I found earlier for $20, but for PCIe this time.

Or any notebook with an internal mini-PCIe slot, though notebook BIOSs are sometimes peculiar about things they don't recognize.

Cheers