Why do you have to have it by the foot? Get the closest length of finished cables. Why not Cat 7 - many people reported improvement, some reported no difference, but so far I don't see anybody reporting decline. 100' of Cat 7 is only $20
https://www.amazon.com/Ethernet-Cable-White-Gigabit-Shielded/dp/B07YV1QMYW/ref=sr_1_3?dchild=1&k...
https://www.amazon.com/Ethernet-Cable-White-Gigabit-Shielded/dp/B07YV1QMYW/ref=sr_1_3?dchild=1&k...