I recently needed holder for "sonoff" clone
You can find it as “Mini Smart Switch”
Here is link to it: https://www.amazon.com/Bkiyougo-Compatible-Control-Function-Required/dp/B0C715JNQ4/ref=sr_1_10?dib=eyJ2IjoiMSJ9.U2SIiRSkD17tkTdXFCU0Jhy4_CbRi26EI4IvW2TFQfKNAlZPFOuGIUamB7Pc21uSnp64t0vOM3MAD_5RB8S3TDR4yZmMFO_huhX2Mxp-4Heqq6LFqfHtYx7RJu5RMNozKItyAc_IpqoEDgQzEgD5DmIuO6pXIqU8zhgAQIrZqCfh-F0TdG58AmPZdP2axzut57xKyuJ3xTgK7roXe8TdmN_Fc8NTPACAsjcy6LA5AEGkhXyTCe7HVCVmD-PfD51e4cwjCNM1z1nw8oGU4924J2U_3UBvkIXbMSE-HY3JYHY.arknqCfRgkm_ext7MJ1XieZyJPq5Sb5hlrwQDsYXpR4&dib_tag=se&keywords=16A%2BMini%2BSmart%2BWifi&sr=8-10&th=1
Happy printing!