The script I bought before was a php, and the thing just won't work. I own two separate domains and the servers on them have always been very reliable re: down time and email forwarding, but neither one offers any kind of native autoresponder scripts.
Anyhoo...I've got an order page set up now for .pdfs to be manually fulfilled and I've linked it to my blog page (if interested, you can click on my name and follow the 'my web page' link). I guess it'll do for now, and since I don't have any big vacations planned in the near future I can probably keep on top of it. A more urgent priority may be getting additional file formats available on the order form. Thanks for taking the time to make some suggestions, though.