[Seeker]

Here's one in green on eBay but it is brand new (hence the price):

Item number: 4627768954

Triumph Trophy Left Pannier Saddlebag BR Green 96 97

Even though it is specified for a different year than your bike, it would be easy to adapt.

PS: I do think the earlier Sprint and Tiger bags were identical.

 

[Seeker]

I just also found only the pannier back..left hand side.:

Item number: 150079986780



TRIUMPH SPRINT ?/TROPHY ? PANNIER BACK,NEW OLD STOCK.