Recommendations for fake Engagement ring to wear when traveling?

Anyone ever buy one they like? I'm very forgetful and always lose some small item when I travel (PJ's, sweater, toiletries, etc). Going to the UK for vacation in a few months for a cousin's wedding, then traveling to London for a week to vacation, so will be staying at a few places. We will be seeing a lot of family who will notice if I'm not wearing a ring. They all know I'm engaged, have met my fiancé, and wouldn't think of any drama if I weren't wearing it...but I'd still like to have a little placeholder and peace of mind! FH thinks I'm being ridiculous, but I still kinda want to spend $50-100 bucks to have a fake when I'm out of the country.

My ring is just a solitaire round 1 carat on a platinum band (so sterling silver, rhodium, white gold, etc is fine for metal), nothing fancy, truly basic.