Hi @gatewaynomad
According to the [https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwi2oPze_dL9AhUKTWwGHRwICTMQFnoECBQQAQ&url=https%3A%2F%2Fwww.laboneinside.com%2Ftag%2Fdell-latitude-e7240-compal-la-9431p-schematic-diagram-free-download%2F&usg=AOvVaw1pFFmBuR8U3LYSNcePXKzL|schematic] for the laptop (see p.40) the Power button switch is an [https://www.mouser.com/ProductDetail/Alps-Alpine/SKRBAAE010?qs=N5Jky1br14OTzsMi%2FXTU1Q%3D%3D|SKRBAAE010_4P] tactile switch. (supplier example only). Here's the [https://www.mouser.com/datasheet/2/15/SKRB-1370719.pdf|datasheet] that shows the configuration of the switch.
Search online using the ''switch type number only'' to find suppliers that suit you best.