Other wattages can be found at the following links:
10W: https://www.ebay.co.uk/itm/265460044257
25W: https://www.ebay.co.uk/itm/265460066702
50W: https://www.ebay.co.uk/itm/264693744396
100W: https://www.ebay.co.uk/itm/264829994145
200W: https://www.ebay.co.uk/itm/264873978964
300W: https://www.ebay.co.uk/itm/264873990921