Where would I be able to purchase beer wort to use in bread? Does anyone know internet sites or stores that deliver?
Where do you live? Are there any wine or beer making stores near your area?
You could buy a "beer kit" which is a can of wort which has been reduced down to a syrup. You boil it in a certain amount of water and you have wort. The can contains the malted barley that has been boiled with hops and then reduced into a syrup. Usually, one can makes a 5 gallon container of wort, although many recipes call for additional corn sugar (yuck!) or malted barley powder to make the 5 gallon brew.
It is possible to buy a 5 gallon container of sterile wort which is ready to brew - just add yeast. This is relatively new. I would not suggest you use this for bread making, since you would not be able to preserve the leftover wort for very long, whereas the syrup keeps very well.
What recipe are you using? Do you really need the wort or do you just need the leftover yeast sediment after the beer is done fermenting?
Nice to see the Charles Papazian reference. Papazian's book is one of my favorite cookbooks of all time. Aside from the obvious ones like The Bread Baker's Apprentice, the vibe on this site probably owes more to that book and me trying to mimic Papazian's laid-back style than anything else.
I've been having the same problem, and there really are no sites where you can buy beer wort. If you want a wort chiller though, there are plenty of options.
Do you just want the maltiness of beer?
You may just want to consider adding Light dry malt extract (DME) for light maltiness, Amber DME for maltiness similar to reds and brown ales, or Dark DME for dark chocolaty beer similarity.
You can also use liquid malt extract (LME) but have to account for the 20% water by weight.
If you want the complexity of malt and hops without the alcohol I'd just boil the beer of choice for 2.5 hours and make peace with the 5% alcohol left behind.
Wanting to buy "beer wort" is a whole lot like complaining that you can't buy "bread dough". It's an intermediate product, not intended for consumption directly.