I too have bought the Thranda aicraft, which I think is great, but I suffer the same as you in not finding a Simbrief profile for it.
Would suggest you try the DHC-2 Beaver, as performance is closest, although obviously looks entirely different being a single engine and a tail-dragger. Likely to work better with Pilot2 ATC though (for example) as they will hopefully take the Beaver performance into account when issuing instructions.
Suggest you join and vote on the topic : Aircraft request: BN-2 Islander
Best wishes,
Mike