I had a strange experience at the NYC Boutique recently, where I went in to get a new strap & clasp for my Speedmaster, and the watchmaker insisted he couldn't sell me anything that wasn't original to the watch. After convincing him that the OEM rubber strap didn't fit me, he produced a few 21mm examples from the back and a matching clasp, but said he couldn't fit either of them to the watch. Bit more friendly conversation later, he relented and fit a nylon DSOTM strap & clasp to my watch, and I left happy. Was pretty different from the super welcoming experiences I've had in the past at Boutiques (Los Angeles, Las Vegas, Munich), where staff bend over backwards to make sure I have the straps and parts I need for my watches. Signs of a new policy maybe?