You didn’t say which component you are planning to power with your cable. IME, high current power amps and even preamps like large wires while digital front end components can get by with less copper but do better with good shielding.
Also IME, the Furutech stuff works quite well for simple DIY, and Eric made a good observation about the current 20% off ac products sale at Partsconnexion. I like the Furutech unplated copper plugs and IECs. As for the power cable, Furutech has a variety and I am not familiar with all of them. I have used the FP-3TS20 (14awg) and found it to be a good basic cable for front end components and preamps. For power cables I like having more copper so you might check out this 10awg Oyaide Oyaide Tunami V2 cable that is available from VH Audio. I made two of them and IME, they sound great but the wire is really stiff. I suspect this Neotech NEP-3200 OCC Copper Power Cable from VH Audio would also be great for amplifiers.
If you are more adventurous, you could consider making cables using NOS Western Electric wire like this 10awg twisted pair. I have not purchased from this seller but the pictured wire looks authentic. Put a tinned braided shield (or, Interference-Shielding Expandable Sleeving) over the pair and counter-spiral a 10awg ground wire, connect the shield at the plug end only, connect the other wires at both ends, cover with techflex and you have a nice PC for your amplifier at a very low cost. BTW, that is the same Western Electric wire used by TWL in their well-regarded American series power and speaker cables. I use doubled up runs (7awg) for the two PCs powering my amplifiers, but they are difficult to terminate when doubled. You might also look at this website for some interesting DIY cable configurations that seem to be popular.
Good luck.

