Yes, I have the Kuhmos, but keep in mind these are the V700 performance tires intended for racing classes that require DOT approved tires. They don’t come with a warranty and many people shave them to 4/32s before use (I didn’t…too cheap!). These are pretty soft, so life span wouldn’t be great for street use. I’m not sure Kuhmo makes “normal” tires in the 13” size.
I also have Sumitomos for street use on the car. These are 175/50R-13s. They look slick, perform well (in autocross) and are pretty cheap. They also ride pretty rough and throw the speedo way off (both of these caused by the 50 aspect ratio).
I’m pretty sure Toyo, Michelin, Pirelli and Yokahama all make suitable tires for Spits. All are good products. Keep in mind the larger aspect ratio (for example “70”), will give a nicer ride but less response. Big aspect numbers are good for rough roads too….I have to be real careful with the Sumis on some of our local roads, due to pot-holes.
Also, I’d avoid “M&S” or “all-season” tires, unless you’re willing to sacrifice dry weather performance.
I install/balance my own tires, so mail order is no problem for me (“self installing” is a legacy from the MGA I had when I was 16….local gas stations wouldn’t touch it’s wire wheels, so I had to learn to do it myself). If I were getting tires installed, I’d probably go to my local Sears when there’s a tire sale (they have Michelins, etc.).
I’ve had good luck with TireRack.
https://www.tirerack.com/tires/tirebran.htm