Haven't had any joy myself for one either but have just set this up to continually monitor Amazon and Argos for stock - Prince25/StockAlertBot on my works laptop. This will continually monitor Amazon and Argos for stock and if it sees they have stock will open a page for me to order from straight away.
Might see if can find one that allows for configuration to actually purchase one for me too as from a few people who i know that have managed to get hold of a PS5 have had to do so in the early hours of the morning (no chance i'm doing that with 2 kids).