I guess they are still trying to figure out what type of skis US skiers prefer, since Vail Resorts bought 55% of the lift company there are a lot more US skiers in Andermatt than there used to be. We had very little snow last season so there were probably very few requests for wide skis.
I might be an idea to keep an eye on the snow report
https://snow.myswitzerland.com/snow_reports/andermatt-oberalp-sedrun-111/ unless they get some more snow before you arrive the Stormrider 102’s might not be the best choice.
Staying in Hospental will make things easier, it’s only a 5 min bus ride from the center of Hospental to the Gemsstockbahn (Gemsstock cable car station). Hospental has a railway station so you will be able to get there from Zürich by train.