Peco
Code 75 Streamline Small Radius Turnout

Right Hand, Electrofrog
Walthers Part # 552-1916, p. 275 Walthers 2012 HO Scale Reference
HO scale, $24.99, currently in stock at Walthers

 
Nominal radius: 24" (610mm); angle: 12 degrees; length: 7-9/32" (185mm).