No replies so I thought I'd try to help, tho it's probably too late. Don't know what masala is typically used, but why don't u just try the normal tandoori masala with mashed garlic / ginger / lemon / chilli thing? Marinate for a while then fry / roast in the oven?
My mum puts ground ajwain seeds in her spice mix for fish (i don't really like it tho).
I ended up buying Shaan packet masala. NEVER AGAIN! It was awful, they just hoy in whatever spices the want. Whole corriander seeds and crushed chillies thats all it was. Foul.
I cannit ask me mum. :(
I shall have to do the whole embarrassing calling up one of my aunties to see what they use for next time.