It's worth repeating a post that our favourite Greek Kostas-K mentioned some while ago. The superb mist-spray washer jets fitted to the Q7 are a straight replacement for the Mk I Q3's jets. Following this I and several others had them fitted and the result is superb - much better windscreen coverage and no mucking about trying to adjust them. Here's a copy/paste of his original post...
You can just try to find on internet jet nozzles with part numbers 4M0955987 and 4M0955988 which are from Q7, they have a spray pattern and easier to adjust, only adjust up/down. They are a direct replacement and are also heated as Q3's factory ones
Found them very cheap on Ebay if it helps, as you understand I have done it
I bought mine from the ever-helpful Tom Fox at Crewe Audi Parts and my local garage fitted them in minutes, not even bothering to charge me for fitting as it was so quick and easy. Well, well worth it! You'll need to check either with Tom (or perhaps Spike might be able to check) if the situation's the same with current-spec Q3s.