It should be bulbophyllum dearei...

Personally, I would go for bulb. dearei more than bulb. lobii, of course if you can get both, its for the best

Maybe these can be quite easy as well...

Bulbophyllum grandiflorum
Bulbophyllum fascinator
Bulbophyllum vaginatum
Bulbophyllum tingabarinum

Cheers