Just the other day I was shopping at my local Costco's and what do I see in the food aisle? Rows and rows of kimchi! And it wasn't some weird unknown brand...it was Cosmos (a very well-known Korean company)! It was $6.99 (I think) and it was a half size jar (58 oz). Since I don't live in an area with a huge Korean population, I was pleasantly surprised! So I bought me a jar and I have to tell you, it was darn good!
Not sure if it's available at all Costco's but next time you go, see if they have it!