Go to VH Audio or Sonic Craft, in my experience both are excellent sources.
Purchase the required lengths of either Neotech NEP-3002 or NEP-3003 bulk power cable and Furutech FI-11 AC terminations (or some more exotic ones if you've got a lot of extra cash and want to get rid of some). I've found these to be the sweet spot in the price/quality/performance ratio.
Put in about a half hour and you'll have excellent power cables for a very reasonable amount of money, easily within your range.
PS: For power amps move up to the Neotech NEP-3001 or 3200 cable.
PSS: Furutech FI-11 come gold or rhodium plated. Gold is very, very slightly warmer. Rhodium plated cost more. Choose depending on your system.