AnnasMom, a couple ON companies that carrier SCCs (Soft Structured Carrier) are
Hip Bundles and
Pooka Baby. I'm sure there are many more. I'd recommend figuring out which product you want first, and then finding ON retailers. Check out thebabywearer.com for help choosing via the forums, and check the directory listings of companies that carry the product(s) you're interested in.
LOL llbgal! I'm still making the Mei Tai's and now other carriers, though I've slowed down a lot since my workstation got moved due to renos.. Can't wait for it to be over!
It was a real pity to hear that even though you seemed confident about using your Mei Hip when you left here, that you couldn't figure it out at home

FWIW, I found the Mei Hip a bit fiddly when it came to putting the shoulder strap across your back and over your shoulder, KWIM? Did you try it while you were in front of a mirror on a bed, or perhaps had another adult to spot-check as you tried it on?
I really need to see you trying it on in order to figure out what's going on that makes it difficult, if not impossible to wear! It would be nice to meet IRL, but I know how challenging that can be. Crazy idea, but if you have a digital camera with video capability, then perhaps you can ask DP to record you trying it on, and then upload it to YouTube so I can have a look!