Just got this email if anyone's interested in the subject kit. $99 and free shipping is almost a steal! I couldn't help it, I snagged one as soon as I saw the email in my inbox.
https://www.tamiyausa.com/shop/132-aircraft/north-american-p-51dk-mustang/pacific-theater/
They also have the Spitfire Mk. VIII and XVIe on sale for the same price.
https://www.tamiyausa.com/shop/132-aircraft/supermarine-spitfire-mkviii/none/
https://www.tamiyausa.com/shop/132-aircraft/supermarine-spitfire-mkxvie/none/
Not sure if the free shipping applies to outside the Continental US or not but I'd imagine not. Only way to find out is to ask.