This is a bit of a odd situation, of needing to recode WooComm to send visitors to a separate website as their store-front (I didn't ask why, I'm just paid to "make it happen.") I've figured out thanks to StackOverflow how to do a, I guess "basic" redirect, but I need to be able to redirect something around 20 product pages to their respective mirror-products on the other site.
Below is some simple code I found here, but I need to modify slightly. The "if(is_product))" I'd like to refine to be specific to each product and to send to their mirror-products. I'm sure there's a better method, but I'm still very very new to this level of coding. And for security reasons, I'm using Google as the redirect destination for posting the code here.
wp_redirect( 'https://google.com' );