mate i dont know of anything aftermarket you can buy except for maybe a lock similar to a bike lock and run it through your spare back to a chassis component. i would go a cable type one and make sure it has a plastic sleeve to stop rattling. and wrap the lock in a bag otherwise it will be so full of mud and crap it wont unlock.
in many cases the thieves are opportunistic and it is hard to get the wheel off without winding it down which you need the long winder for, or they have to cut the chain. again if they want it they will get it. bastards stole my stainless shackles i had on the back to extend my trailer chain with.
could be worse - the old hilux's (not sure about new) used to use a cable system and not chain which suffered 'failures'. my brother lost a brand new BFG all terrain and rim without even knowing it, just a broken cable with a frayed end hanging! i hope it didn't fall off when someone was behind him. he had no idea.
This car is like a bad drug habit. It is taking all my money and time, my family are concerned, but new mods just feel sooooooo good.