Temp Foster home for my Labrador, please help! (Málaga)

I desperately need to find a temporary foster home for my 4 year old Golden Labrador. I have to leave Spain for 4 months but do not want to put him in kennels. I am really desperate to find some kind person that would take care of him for me while I am away. I need him to be in a loving home. He is such a beautiful boy. Very obedient and well trained. He is castrated and is up to date with all his injections etc. He is absolutely no trouble at all. Great with kids, loves to fetch a ball, loves a cuddle, no problem at all with cats. I will pay all costs and some more on top but just need to find somewhere as soon as possible as planning to leave early October. If anyone can help, please let me know I would be so grateful.