I have a great Wharfedale Vardus 5-piece set and I'd like to understand if/what options I have to replace the cable connections with a wireless solution (I understand there are bluetooth and WiFi arrangements, but I only see ready-made sets).
First, you will need to provide a power amplifier for each different speaker cabinet. You did not mention what model you have so we don't know what power, what kind of processing, etc. you would need.
Then you will need to divide your signal (source not disclosed) into the channels appropriate for each speaker cabinet and come up with five wireless links that would operate together without interference.
This is quite a considerable engineering exercise. It may be the case where if you have to come here and ask, you may not be up to the challenge. Frankly, ordinary wires are FAR SUPERIOR to any kind of wireless link.