Thanks Andrew. There are a few places that sell these, but it seems that the switching block comes in different models, so using the existing one may be an option to keep costs down. some sellers below, and hopefully this will help anyone else searching for a fix to this problem in the future! https://uk.rs-online.com/web/p/push-button-switches/6915371 https://www.enrgtech.co.uk/product/push-button-switches/ET13979715/A1PCA1X217K403 https://www.autopoweronline.co.uk/products/savage-switch-silver-momentary-fan https://www.carbuilder.com/uk/natural-billet-aluminium-fan-switch