China, and I don't mean that to sound in anyway other than
Check your wavemaker and it will say made in China, there will be a model code or long number, enter this into eBay and hopefully this will be the item you have, then look into parts, it may take 1 month to arrive, other than that your paying premium for same part from us/UK which maybe overpriced, or look at other sellers selling 'used' wavemakers