I can recommend Smith London for caps. https://www.ebay.co.uk/usr/smith-london Very well made, good shape (much better than anything else I've bought) and they actually come in different sizes.
Glad you like it. Cotton kills, so they say. Mountain rescue teams I mean. People hiking in jeans get hypothermia. So we need cotton caps for hot days and polyester ones for the cold. I've asked Smith if they can make caps with fabric supplied by the customer. No reply yet.
Shimano caps have appeared on ebay https://www.ebay.co.uk/itm/304618890361?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=4H3HvLb9Qiq&sssrc=2047675&ssuid=0PDdBtKRSKe&widget_ver=artemis&media=COPY
I can recommend Smith London for caps. https://www.ebay.co.uk/usr/smith-london Very well made, good shape (much better than anything else I've bought) and they actually come in different sizes.