I just did a quick search with 'giant grape vine wreath' and found a 5' wreath at the first place I checked, so think you won't have problems finding one... you'll just need to add your own bow, etc. here

OK, thanks...I was hoping to find it local though and not have to order it...

oh, sorry, I can't help with your local unless you live near me. lol! (I weave).

The higher end garden centers will usually make something custom for you, esp w advance notice, but it will prob cost more

Ask your local garden center or florist. It may cost more, but support local business!

You can check with wood artisans on sites like Etsy and input your keywords. There are quite a few talented wood crafters there who could do a custom piece for you. Hope it helps! :)

I just remembered that I do occasionally see them at a place like Michael's, A.C.Moores, or the Christmas Tree Shop. Do you have any stores like that near you?

Yes party music I do, but usually I only see smaller wreaths...not the real big ones.

The garden centers may be a possibility...

I think Hollandia has a big xmas shop

I've been to HL and Michael's in a few different areas and they all have seem to have the large wreaths. I think because they take up so much room they are usually hanging high up on the walls.

Why don't you get smaller wreaths, take them apart, soak them in warm water and secure them to a hula hoop or you can just make the wreath simply bigger using all the soaked vines and wiring them in the size you want. If you soak them long enough they will be pliable/

Does it have to be round? You could use PVC and do a square or a star shape...

It's not local to you, but you might have similar nearby. At the farmer's market here, they have several vendors that sell Christmas trees. I know at least one of the vendors sells wreaths, pre-made and custom. One option is grapevine. So check you local farmer's market , flea market, craft market.

I did come across this...http://bungalow23.com/2011/12/24/making-a-giant-christmas-wreath/

If you want a wreath with real pine boughs then local florist is your best route, but most of the big box stores have artificial wreath for outside that get quite large. Mine is 6ft. across, but got it at a sale years ago. I wonder how large the boy scout wreaths get--but they put their orders in already.