The Switch is somewhat hard to find these days thanks to the huge demand, but if you're willing to pay a little extra and get some additional tat with your machine, then these two new themed bundles from Nintendo UK might tempt you.
The online store has the "Hyrule Hero Pack" and "Racing Pack: Second Lap" for sale. The former comes with The Legend of Zelda: Breath of the Wild and a swanky Breath of the Wild shirt, and costs £339.99. The latter is bundled with Mario Kart 8 Deluxe and an amusing Luigi Death Stare shirt for £329.99. The Zelda pack is available now but the Mario Kart one is on back-order until June.
If neither of those bundles take your fancy and you don't mind waiting a while, then this Splatoon 2 bundle on Amazon might be more of interest. It doesn't come with a natty shirt but is a little cheaper than Nintendo UK's bundles.
Let us know if any of these offers have convinced you to part with your cash by posting a comment below.