I did think about it, but I'm not entirely sure if I want to sell them. Maybe in the future.
The exhaust shroud isn't that hard to make from brass sheet, but the rear fenders would be harder because of the curve. Printing these parts wouldn't look that nice as brass sheet does.
The mantlet is on the list to be printed actually. Work on it will be started when I actually start construction of my Early Tamiya Tiger I. I might also plan to print some of the other Tiger I parts like the Initial stowage bins (side mounted ones) and the Turret ring guard.
Most of the parts that make up the K-sprue are part of the Tunisian Tiger set by Aber (
http://www.aber.net.pl/detal,1237.html). It's a pity they don't sell parts of their kit as separate pieces.