There are definitely one or two more shops interested in stocking bits (I think Brock/Fusion already do) now, not personally aware of the importer situation though.
Ordering from the far east is dead easy though, various places have bits but my main sources are
www.stellamodels.net, rc champ and
www.rc-mushroom.com, I find them all good to deal with and quick, my last Stella order I paid for on a Saturday morning and it was delivered Monday morning, 48hours!! Usually takes 3 or 4 days plus customs though, if you pay EMS shipping (well worth it on bigger orders!).
Plus I've got most everything in my pit box and hopefully people like Pugs and Donutt can attest I'm happy to supply replacements if you get caught short!!