Solutions Direct has a fairly wide selection of stainless steel laboratory sieves.
http://store.solutionsdirectonline.com/categories.aspx?Keyword=stainless steel sieve
Delta-decalactone is one of the principal ingredients in the odor of coconuts. Given the very small amount I suspect it may be to adjust the odor of the whipped butter.
http://www.savoryspiceshop.com
They have a wide selection of spices at reasonable prices and their shipping is prompt.
I've bought piment d'espelette, vadouvan, urfa biber, asafetida, and tasmanian pepper berries.