Amazon.com : ZZJMCH 2 Pack 37mm Center Pinch Front Lens Cap Compatible with Olympus Canon Nikon and Other Brand of Lenses with 37mm Filter Thread, Replaces Olympus LC-37B Front Lens Cap :
New OLYMPUS 40.5mm PRF-D40.5 PRO Protection Filter for TG-6 & ED 14-42mm | eBay