I'm sure the wheels would fit fine. The tire maybe a one size low in diameter, but would surely still work. Your Y might just sit 1/2" lower and have 1/2" larger gap in the wheel well. But will get you through the snowy months until you bolt back up your summer wheels.
Price with winter tires for model y:
Tesla Model Y 18" TSS Flow Forged Wheel & Tire Package. Tesla Model Y 18" TSS arachnid style flow forged wheel is manufactured exclusively for the Tesla Model Y. Get Tesla Model Y wheels now! Order lightweight flow forged wheels for your Tesla Model Y at T Sportline home for Tesla Accessories...
tsportline.com
Price with tires for model 3:
Tesla Model 3 18" TSS Flow Forged Wheel & Winter Tire Package. Tesla Model 3 18" TSS arachnid style flow forged wheel is manufactured exclusively for the Tesla Model 3. Get Tesla Model 3 wheels now! Order lightweight flow forged wheels for your Tesla Model 3 at T Sportline home for Tesla...
tsportline.com
Less than half price from new either way you slice it.