That is unfortunate about cashews, but I'm jealous to read of the choice of rice varieties - it's a funny world!
In the UK I think I'd have a hard time getting anything other than generic 'basmati' (which afaict just means Oryza sativa indica - it could be IR24, what you're calling basmati, anything else in the subspecies, or some blend with the yield & shelf-life & availability properties they wanted) that would be at all suitable for (my attempt at/interpretation of) 'Indian' food.
Whatever it is I suppose I subconsciously agree it's bland - I tend to cook it with some rai/jeera/ilaayachi/laung depending.
(Edit -) It just occurred to me that the cashew issue is probably not helped that they're hardly cheap here, largely eaten as a snack (roasted & salted) on their own - which supports a higher price, I suppose, than more common use as more of an ingredient (e.g. kaju katri, ground up in creamy dishes) in India.