[NEEDS INFO] "best weapon-1" bind

Is there any possibility to bind the access to the weapon which comes just before the bestweapon?
Sort of "bestweapon-1" bind.

What about binding "bestweapon;weapprev" or whatever the bestweapon command is...?

does not work
With bestweapon;weapprev, only the weapprev is taken into account.

Other ideas?

Perhaps "bestweapon; wait; weapprev"

it works better, but not perfectly: when the bind is called, most of the time i get as bestweapon-1, expected.
But sometimes, i get first bestweapon and then bestweapon-1, so the global weapon switch is longer.
Can we specify an amount of time to wait in the wait command?

defer <seconds> <command>

"wait" waits one frame, I don't think you can make it shorter... Can you try this? "bestweapon; defer 0 weapprev"