Does yours have the "Eagle Eyes" double headlights or the old style single headlight? There's been at least one case on this forum in which 2 owners swapped windshields. Older Xcitings had a significantly taller shield. I can't say for sure which you have but you can look around the web at pictures of various Xcitings and figure out if you've got the shorty or the older biggie.
If you have the double headlights, I don't think you have the option of changing to older model shield. If you have single headlight, you can look around for a used older shield or even order a new "older model" from Kymco or a dealer.
Also, there're a number of posts here from owners who have bought the Givi brand "touring" windshield and are happy with them. I think they are available in a couple of sizes.