looks like if you purchase the parts from here [product|IF248-015-4] the flex cables are included.
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If you just want the flex cable, you can find those on places [https://www.ebay.com/itm/New-LCD-Flex-Cable-Ribbon-For-Samsung-Galaxy-Tab-2-10-1-P5100-P5110-P7510-P7500-/112633515460?_trksid=p2385738.m4383.l4275.c10 |like this] or even [https://www.parts4repair.com/lcd-connector-flex-cable-for-samsung-galaxy-tab-2-10-1-p5100-p5110/?gclid=Cj0KCQjwtMvlBRDmARIsAEoQ8zSNwurxr0-pYGy1c5QvIDNPxVGMZQk9VDqyRFeFUiMt6UXEfQGIXjgaAiaYEALw_wcB |on here]