Cheapest place to have large page number pfdf printed and spiral bound into book

[mokwit]

Looking for cheapest place in Central Bangkok to have large (400) page number pdf printed and spiral bound into book. Have been quoted Bt3 page at print shop on Panthip 1st floor but that sounds high.

Need to clarify if that is per side printed or per sheet of paper regardless of printing on both or one siode.

Remember there were places at Mah Boon Khrong (but going there means a sharp reminder that I am 51 years old).

Needs to have staff who can print both sides of a page the right way up and in the right order - can't take this as agiven - so direct experience welcome.

[HeijoshinCool]

There was a grouchy old cuss in a dusty shop on Sukhumvit Road, at the head of Soi 22. Don't know if he is still there, or his prices are the same, but a few years ago his quantity pricing was 1 baht per page.