and the catbirdbaby - but that has buckles dosent it?
Catbirdbaby make both a mei tai, and a SSC (soft structured carrier - ie: one with buckles) called the Pikkolo.

Out of curiosity, why do you particularly want a mei tai - what benefit do you see it having over the Ergo? Do you find the Ergo uncomfortable (often a reason to use a mei tei, they are more adjustable and often more comfortable). Or do you hope to use the MT whilst your bub is little, then use the Ergo more as a toddler carrier (which is where the Ergo excels)? If that's the case, the catbirdbaby is an excellent carrier for babies, as it has a cinch strap that allows the bottom to be cinched in, making it possible for very young babies to be carried legs out.

You mentioned that you thought a mei tai would be quicker and easier around the house - I wouldn't say that a mei tai is quicker as such, although once you get the hang of tying it is just as quick as an Ergo, but it wouldn't be quicker. You also mentioned that you would get a pouch, but didn't want a non-adjustable carrier. Have you considered a ring sling?

Re: the parents of invention carrier - judging by the way the baby is positioned (ie: supported by the crotch, which is not recommended as an ideal carrying position) it does not look comfortable for either baby or wearer. Personally I would not buy one.

There are not too many good mei tais that are consistently available as in-stocks in Aus, so be prepared to order. I would suggest buying based on what is going to work best for you rather than on immediate availability. You could try brindabella baby, they do have other things in stock to what is on their website. I think they have a couple of Mei Favourites on their ozebaby store.