Hi duckbill,
Unfortunately I don't have a US source for the Silva SERE 40 compass.
I purchased my Silva SERE 40 here in the UK at
http://www.springfields.co.uk/product_info.php?cPath=24_39_69&products_id=3148 The FB 1605 NATO Survival Compass available at
http://www.bestglide.com/FB1605_Info.htmland
http://www.tadgear.com/x-treme%20gear/compasses%20main/sas_compass.htmalthough more expensive and almost twice as heavy (almost 2 grams more
) is an excellent model as well.