C21 help: Larger inventory?

So, I've been playing around with C21, and thanks to the guide already here (Thanks, sircusa!), I've managed to hold my own, for the most part. However, the guide mentions buying a bag to get a larger inventory for 5,000 C$. Problem is, I can't find such a thing. Anywhere. Or even anything for that cost, or anything that looks like a bag. So, can anyone with experience with the game help me out on that score?

Well, I managed to figure out that it's been changed to a cash shop item (D:), for 30 metal in the cash shop. So, in case anyone was wondering, there you go.