I hear ya scubawalk, but the post office has been working great for me this year with suppliers sending packages and my paying duty right here in san Pedro.
Again DHL is a rip off the charged me 10.us extra the last time someone sent me something DHL just because i lived on this side of the bridge.
I had to pay it or not get my package.

White Sands Dive Shop
https://whitesandsdiveshop.com/