Vite is now listed on OKEX, Bittrex, Upbit
https://international.bittrex.com/Market/Index?MarketName=BTC-VITE, https://www.okex.com/market?product=vite_btc
https://upbit.com/exchange?code=CRIX.UPBIT.BTC-VITE
You can try those to buy VITE ERC20, then convert to VITE Coin if you wish to, conversion is doable right in your wallet on mobile, just need to send a little gas in that ERC20 address.
Since Vite coin is not traded yet so no way to buy them directly now, OTC is now allowed in Vite sites by the way.