I ask since I'm in Texas   -- my go to sources are far away from you .

You can often get replacement parts  , usually the entire sprue containing the part , from Revell  . if you know which kit it is :

https://www.scalemates.com/search.php?fkSECTION[]=All&q=Revell+he+115*

Those kits on that page have the instructions so you can see which sprue it is

or of course  , purchase another kit .

A member here  closer to you might have a better resource