I'd say the quickest routes to these horn sounds: Garritan JazzBand, NI Session Horns, Broadway Lites but none of those are free, or cheap. If you already have Kontakt and InfinitePlayer, you can probably get a decent horn library relatively cheap at eSoundz. There are some inexpensive libraries for Kontakt that are available that might help here and there in building a brass section for you (remember, you don't have to record ensemble, in a single take). You might also want to download UVI workstation (free) and see if anything in the factory demo library helps you out. The cheapest route would be a decent brass patch (or combination of brass patches, hence the reference to Xpand!2, which can layer them with individual velocity/aftertouch/cc parameters to get timbre variations). You might want to check out the inexpensive (sometimes as low as $7) SynthMaster Player in this regard. Also the work-intensive process of building a Kontakt library from free, on-line samples. There was another post further down the page that asked about inexpensive/free VIs. There is a lot of capable stuff that ends up on sale in the $100-150 range if you keep your eyes peeled, especially if you have Kontakt.
Paj
8^)