Does anyone know of a winnery in Italy that allows you to blend your own wine? (Mix their wines together and bottle your own mix)?

No decent winery that strives for quality would offer this.
The mere thought makes my toenails curl.

Agreed. Of course, you can do whatever you want with two bottles of wine when you get home, but that just sounds strange. Toenails curling over here too!

I have heard of people in France, Spain and Italy doing this though not by the bottle (barrel minimum quantities normally. For instance Martinez of Ilkley has done it for his own use as have some of the better wine critics in UK.

You can also buy wine "en vrac" in these areas and mix as you wish. Wines for this can be plonk but it is possible to find at least AC quantity.

Is it common? No. Do I have contacts? No.

Also I don't think it's called a winery in Italy.

Hi PM,

From your question, I deduce that you are not such a wine aficionado or connoisseur that you could produce a better bottle than the vintner does.

May I suggest stopping off at a couple of enoteca (wine bars) and sampling the goods?