Dude. Have you heard of Kalustyans?
https://foodsofnations.com/index.php?route=product/category&path=14_169
They have the ultimate spice blends for Indian food.
The real store is in NYC and I'm planning to swing by in the next day or two while I'm in town... there's a giant room with hundreds of spice blends for any Indian dish you could imagine. I'm not sure how easy/possible it is to order any of that online, but if you can, I'd highly recommend their Vindaloo blend (if you can handle spice) and the Tikka Masala was good too.
Of course! Spice blends, now that would save a ton of work. We have stores in Rotterdam that sell them. I'll check if they have this brand. I like spice, but spicy to a certain point. When I burn up and have to stop eating to drink milk or water is usually my limit :)