3 cars => 1 key, need advice immobilizer-wise

[braaap]

Hi there,
in order to have only one key with me for all our three equal cars (all Suzuki Wagon R+ around 1999) I would like to change all locks and keys to the same setup in each car.

Should be doable, but what about the immobilizers?

Can they be manipulated adjusted to work or set out of function completely?
Or could I buy three equal units, if still available?

[dodgerover]

You can set some cars to accept a new key code (rather than a blank) as long as you have the original.
Or just zip tie the original key near the sensor on the ignition barrel under the plastic covers and use none sensor keys.

The rest is ready just order 2 sets of new lock barrels for the car who's key you wish to use.