It's an option on shirts at a store in Beverly Hills. I believe they request the cuff modification from their factory in Italy. I think this option is better than what Agnelli did because you do not need to adjust the bracelet or deployant size if you want to wear it normally versus using this, and
Many countries now electronically notify US customs when one applies for the VAT refund when departing the foreign airport. I don’t know if Hong Kong has VAT or is one of them (France definitely is). It can make for awkward or worse moments entering US customs. This has happened at SFO.