http://vintagespeedsterparts.com/lighting.aspx has European tail light lenses for $6.50 each and horn grills for $22.50 each. Shipping used to be a flat $15.
I've seen the old '70's AMCO wood knobs on ebay but not cheap any more--- $150! Here's a pleather one for $80.
https://www.thesamba.com/vw/cl...etail.php?id=2110032