That's a fairly rare occurrence, any idea of the cause? Have you at least confirmed the diagnosis and or checked or cleaned the throttle body loom plug contacts?
Otherwise, check an official parts seller for part usage info.
From this site,
https://parts.subaru.com/p/Subaru__/CHA ... AA310.html which I found via googling the part number, I found this usage info.
Subaru Forester 2.5L TURBO 4AT XT 2011, 2012, 2013
Subaru Forester 2.5L TURBO 4AT XT Limited 2011, 2012, 2013
Subaru Forester 2.5L TURBO 4AT XT Touring Limited Plus 2011, 2012, 2013
Subaru Legacy 2.5L TURBO 6MT 4WD GT Limited Sedan 2010, 2011, 2012
Subaru Legacy 2.5L TURBO 6MT 4WD GT Premium Sedan 2010, 2011
Subaru WRX 2.5L TURBO 5MT 4WD S SEDAN 2011, 2012, 2013, 2014
Subaru WRX 2.5L TURBO 5MT 4WD SEDAN 2011, 2012, 2013, 2014
Subaru WRX 2.5L TURBO 5MT 4WD WAGON 2011, 2012, 2013, 2014
So those are the potential donor models/years...
Check eBay for second-hand availability and guide price...
https://www.ebay.com.au/sch/i.html?_fro ... =2&_sop=15Say $200 odd posted, use PayPal obviously if choosing to use eBay...
Then check your local (or interstate) wreckers to see if there are any matching cars/parts at a decent price.