I did that home kit about the same time the England kit came out. I thought City don't really do collars - so based it on the whole retro/simple thing Umbro are doing, thinking of the old 60s/70s round white neck collar thing, but I had a sheild around the badge at the time - I'm not too far off - too much detail(!).
I don't know for deffinate who's seen the third kit, but I'm pretty sure - but the details are a bit sketchy - colours are correct, but detail/design isn't.
I didn't see the ones that were posted here that got deleted, but I think I have seen them - havn't bothered to ask what/whose designs they were, but I got a good idea.
Tbh, all the info is actually here in this thread, just takes some trawling through the pages and pages to find out.