what Vass has in it's stock is pretty random. Most people don't seem to understand that Vass is not a large commercial operation like e.g. EG.
Vass is much closer to a traditional artisan, you have to take the time to develop a solid relationship with the Vass people if you really want to get the best out of them. This takes time, but you will be rewarded with the best RTW shoes anywhere at very low prices.
Otherwise it is much better to go through one of the established proxies and take the risk of receiving a shoe without trying it on.