The only reputable blockchain analysis firm i know is
https://chainanalysis.com - but i don't think they offer such services for individuals, or at least, they don't anymore. You could contact them and see if they're willing to help you out somehow. (175
BTC) is a large amount.
There are a lot more (especially if you include invidividual persons taking such work like the guy behind wizsec), chainalysis just gets mentioned the most in the press.