Sony ALCF55S.SYH Lens Cap for 55mm Diameter Lenses - Black: Amazon.co.uk: Electronics & Photo
55mm Lens Snap Cap | SRB-Photographic.co.uk
Minolta 55mm Lens Cap – Cameras By Max
55mm Lens Cap Cover for Sigma 56mm f/1.4 DC DN,18-50mm F2.8 DC DN,Sony FE 35mm F1.8, T* E 16-70mm f/4 ZA OSS,FE 28-70mm f/3.5-5.6 OSS Kit Lens 55mm Filter Thread [2 Pack]:
LC-55 55mm High Quality Design Centre Pinch Lens Cap with Sony Logo - UK STOCK | eBay