新加坡采购需求：铝梯级，电梯制动器，电梯部件，自动扶梯配件，自动扶梯链条，自动扶梯链条

I'm looking to purchase a variety of Otis parts as well as some specific PC boards. It's important for me to get high-quality components that ensure compatibility and reliability. Could you provide details on availability, pricing, and lead times? Additionally, I'd appreciate it if you could send over any product catalogs or technical specifications that might help me in my decision-making process. If you have recommendations based on my needs, I'd love to hear those as well. Looking forward to your prompt response!