Here are the materials to make an illuminated remote switch. A non-illuminated remote switch is easier but I prefer this style since it provides visible feedback as to the current status of the electronic equipment connected.
The materials are:
Qty - description - cost
1 - rocker switch Digikey
part no CH809-ND - $1.24
1 - plastic enclosure Digikey
part no HM375-ND - $1.60
1 - surge protector with removable back cover - $15
6ft - 14 gauge 3 wire electrical cord (should have black, white, and green wires) - $5.00
2 - 2" lengths of 3/16" heat shrink (not shown)
1. Most power bars already have an illuminated switch. You could simplify this project by simply relocating that switch remotely, but I prefer to have a remote switch that only controls some of the outlets on the power bar allowing others to be "always on".
2. Costs for Digikey components decrease with quantity. It will also take you less time per unit if you build several at once. I purchased 10 each of the switches and enclosures for this reason.
3. This particular power bar was for a computer, so I used a surge protected power bar. Non-surge protected power bars are less expensive.