Howards Storage have some but like most I think the mirrors are small. I also found a really nice one on Marks & Spencer and they have free delivery in September. (it's not really in the style you were wanting sorry) http://www.marksandspencer.com/square-extendable-mirror/p/p22319481?source=affwindow&extid=af_a_Content_79682&comgp=79682&awc=1402_1411636962_c6aa0b8cc845d5ae78080e37730547c8

Changes cost an absolute bomb so consider your modifications carefully Joy. Looking at both plans you've not altered the design much rather you've moved rooms around whilst trying to retain the original content. Some rooms appear less usable as a result. The #2/bed/study is one, seems too small, even the guest bed seems smaller and it didn't appear large to begin with. Without room dimensions it's a bit tougher to make comments however. I wonder why you made the guest bathroom a powder room given the location is such that it won't be used as frequently as the bathroom off the main living area? Sure put the doorway into the guest room so the bathroom can service the bed/study too but don't lose the shower up there. Nothing worse for guests than having to pad through the main living area in their pj's to the shower or worse with a towel wrapped around their middles on the return trip to get dressed. It's enough to put some off their cornflakes! I'd seriously rethink some of those changes Joy they will cost you a lot with little gain methinks. I'm sorry to sour the mood I know it's an exciting time but I'd hate to see you make expensive and possibly unnecessary decisions.

I picked tidy & organise the home, due to the fact we rent & would love useful information & photos of how to store things with limited space & making it feel more like a home without breaking the budget, would love to win the beautiful book for a dear friend who has had a rough couple of years & I know enjoys cooking, she deserves to be on the receiving end of something nice

Invest in a custom made one from your local glass and glazing specialists - it'll be made to fit the vanity top exactly and the edges of the mirror should also be sealed to prevent corrosion. (which often happens to mirrors from the hardware stores)