Sorry, SPD is "Society for the Physically Disabled". They have a book binding business with huge amount of work from local and overseas libraries. They also have a small custom service run by a nice lady called Ruby.
The place is at Tiong Bahru (2 Peng Nguan Street) and you can call Ruby at 62366382.
Try not to ask for services during their peak periods between Feb to April though, they will be very very busy and might not do a good job. However, their workmanship is quite good in general.