I am looking specifically for 2 gallon or 4 gallon carboys. I have looked on eBay, Amazon, Homebrewing, and many more, but I cannot find a 2 gallon or a 4 gallon glass carboy. There might be some plastic options out there but glass is what I am specifically looking for and avoided looking at HDPE options.
Have any of you encountered or know of an online option of where I can buy this size? If you haven't are there any options for custom making them, such as from a glass vendor?
I quickly looked through this forum and didn't find this question asked, so if I did miss it please redirect me to the question if this is a duplicate. Also, the carboys of this specific size are needed for a wine experiment.