Are there any sources where I can find different pcaps samples for IP fragmented data (WireShark compatible)?
See the files attached to the following Wireshark bug reports for examples of IP fragmentation.
I would note that IP fragmentation is IP fragmentation regardless of the payloads carried over IP;
What are you looking for that you wish to see "IP fragmentation of FTP data, images, files, etc" ?
Is it actually TCP re-assembly that you wish to look at ?