I'm keen to try this. This looks like a standard chilli sauce recipe but with chilli powder instead of fresh chillies as a shortcut. Did it taste like a chilli sauce you've bought before Jerry? Buying a jar might be easier for some people is what i'm thinking.
I've been noticing that prepared pastes/sauces seem to be 'the secret' if anything is. Whether you make them or buy them, they always have one thing in common: strength and balance of flavour. Check the below list and notice they all have saltiness, sweetness, sourness and savoury.
Mango chutney This is my favourite BIR tip. My dansak and pathia are the most popular of my dishes.
Tomato ketchup As with chinese food and ragus this just works. Of course it should as there's tomato in most curries and it's savoury and sweet: exactly what you're looking for. I had to apologize to my girlfriend for not believing it's credibility in cuisine until Heston Blumenthal used it!
Bunjara This tastes beautiful on it's own and is very moorish. I used quite a lot in the finished dish to start with but i think i've realized that it just needs to be seasoned correctly when made. It should be sweet, savoury and salty with a bit of sourness (and bitterness?) from the tomatoes.
English mint sauce I havent used this myself but have spotted it in tandoori and chasni recipes. If i remember rightly it's quite sour. The coolness of mint also adds a dimension (in the same way chilli does).
Sweet chilli sauce Like tomato ketchup, it's a classic that works it's magic in almost any cuisine. I havent used it for a while in BIR but something normal like maggi or linghams is what i'd go for, rather than a caribbean one that tastes of scotch bonnet or a thai/chinese one that's overly sweet and gloupy.
This garlic chilli sauce Yet to try it but should probably be classified with the sauce above.