I was in the market for a carry case to go along with my son's Nintendo Switch and I had ordered the Zelda listed one on HUKD earlier. Based on comments though I began to wonder if a hard shell case would be better than soft, especially considering the value of the hardware to be carried around by my 13 year old. A search on Amazon has turned up this one for a tenner. No fancy graphics or Nintendo branding but it looks like it would do the job for a reasonable cost.
Nintendo Switch hard shell carry case - £9.99 + free UK delivery - Sold by G-Hub @ Amazon Marketplace