I think I would try these for $8.99 in 4-foot length:
https://smile.amazon.com/dp/B01D5H8P..._t1_B01A7SG6WK
Caution - see the review comment about the diameter of the connectors making them not useful if the equipment jacks are too closely spaced
The large diameter of the cable may be an indication of low capacitance.
If your turntable and amp have ground lugs, add a simple ground wire, type is not critical.