Bessacarr spare remote fob

Hi, We have just purchased a 2004 Bessacarr 720 - which is on a Fiat Ducato base.

She came with one "standard" key, one key with red insert (which I assume is for programming spare keys) and one alarm remote control. The remote control is round and has a single button, basically toggles the alarm on and off and also locks/unlocks the doors. Neither key seems to turn the alarm off.

So understandably we're a little concerned about the possibility of losing or breaking the alarm remote. A quick web search hasn't turned up spares, does anyone have a suggestion as to a source for extra controls please?

Thanks in advance