the stew-mac stuff (Fiebing leather dye) works wonderfully and is easy to get hold of
have you heard bad reports about it?
in all honesty i only use it occasionally for fretboards - generally i try to stick with ebony that is almost pure black or purposefully streaky like mac ebony. but i have done a few and the dye has come in usefull for many other projects too
i am in the UK so they wouldnt ship it to me either, but since the brand is clearly readable on the stew-mac website a quick search found the exact same stuff here. i am sure what you have got will work fine but make sure to test it first since there may be a difference