Im not sure about another puffer... I already have an arrowhead puffer but it is nothing personality wise compared to the hairy puffer. Its kind of hit and miss with these 'lurkers' as to what you get. I happened to have got a very outgoing hairy puff and then a pet rock with the arrowhead. I know schoutedini are said to be a lot more outgoing, maybe one day.So sorry to hear! Sudden losses suck big time
If you are looking for another puffer then the Tetraodon schoutedini are lovely, albeit expensive. Could keep a few in a tank like that