Maybe your customer would like blue balls.
I know a couple of people who repaired theirs with blue epoxy about 15 years ago and they are still as good as "new".
It seems to hold up better than chrome.
Here's one of the posts about them from the LRO mailing list:
From: Easton Trevor <TEASTON@xxxxxxxxx>
Subject: Swivel Balls
Date: Wed, 12 Jul 95 07:39:00 DST
Like Andy Woodward, I used epoxy compound to fill pits in my swivel balls. I
used Devcon Titanium Putty, then painted the whole surface after bead
blasting with Petits Hobbypoxy two part paint. I now have attractive french
blue balls but you can't see them as they are wrapped in leather gaiters.
Four wheel drive allows you to get stuck
in places even more inaccessible.
62 88 Regular
67 109 6cyl NADA x2
74 Lightweight - The Antichrist
95 DI 5-speed
95 D90 5-speed
97 D1 Automatic