My 86 Parts book does not show the number you have listed. It shows 5227255 for most K-cars with 2.2 Turbo and 5227261 for 2.2 Limo. I am not sure if the 2 will interchange directly.
The 5227255 is readily available as it fits alot of cars. Arizona parts has it NOS and used (but he is on vacation now.)
http://arizonaparts.com/ It can also be found on Ebay.
I found this used one listed on the link below as coming out of a donor 86 Chrysler New Yorker F (which I think is the Limousine/Executive Model) - so it may be coded correctly for the Limo/Exec. - if there is any significant difference.
http://www.ebay.com/itm/86-LEBARON-ENGI ... 1587368937If you want to know if there is a significant difference between the Limo and regular unit, someone on the Turbo Mopar site might be able to tell you.
http://www.turbo-mopar.com/forums/content.php