I've been using
http://www.dwidigitalcameras.com.au/ - everything i've ordered from them (a Samyang lens, and some adapters etc) has been very fast (the samyang under 48 hours delivered from OS) and quality merch.
I recommended them to a friend and they let her down - but I think there was more to the story centering around payment, no PayPal and a lack of credit card - so as long as you can pay via internationally acceptable methods - I'd cautiously recommend them!