I like to use rotational sky maps to use in the field, but I have this only for latitude 50°N. I'd like to have a similar sky map for tropics: 10°N. Do you know where I can order one?
Skymaps.com offers free rotational style sky maps to print out in PDF form each month, including equatorial editions (scroll down half way) that are drawn for 0° but good to ±15°.
Have you thought about Google Sky Map for Android or Star Walk on iPhone? These may give you what you need.
(I know, batteries run out, phones get wet etc., but these will show sky at a particular time)