Hanging Large Mirrors

I am interested in the following lay on a bare wall to "tie the room together." Dimensions: 60''L x 30''W about. But it need not be exactly that. If I can not fine a large mirror, then a few small squares placed together should do the job. I'm having trouble finding a line of blue glass mirrors. Believe me, I spent hours looking for s ... If you please help. Thank you.

An antique store. I saw them, but the only place I know, except maybe a pawn shop. I love thrift stores and sometimes you can buy one at the Army Hi, they usually furniture.

Yes, the Internet can be difficult when looking for things to buy, but it is probably the best hope. If you have not tried Ebay already, go ahead. They have almost everything. It's either a HomeDepot / Lowes Home Improvement, somewhere near you.
Good Luck