Mondrian is a possible solution
Mondrian - formerly Treck Hall sold me a a few 5L and 10L RA-4 dev and blix kits last summer. Pleased to take my order over the phone, took my credit card detials, charged for the non-stock items, and flicked me an e-mail when the stuff was in stock about a week later.
I went to pick it up; $55 plus hazmat paperwork charge for shipping is a meaningful expense at my hobby level. One of my three 5L RA-RT dev kits on order was out of stock when I turned up, despite what the computer said, and they credited my credit card the next day.