No 9 or 1949 as she is known now for the benefit of IE's computer is actually a K31, not a k15. Unfortunately no k15s survive today. The last one no 98 disappeared in 1995 after she collapsed during a shunt.
yes the rpsi has 2 MK2ds 5203 and 5106, RPSI 303 and 304, as well as the state coach 5408 on long term loan. 303 pictured in the link above is almost ready to go after a long overhaul.
Now would be the time to get a photo as 171s boiler is currently out of her frames, and in the near future her motion is to be stripped, so if you want a complete bottom half photo act quickly!
Regards
LE