I couldn't find this TV series to download anywhere. I searched the Internet every few months for years. No luck. If anyone wants it, drop me a line. Here's the details:
Written and directed by: Rodney Fisher
Cast: Linda Cropper, Hugo Weaving, Jon Ewing, Peter Carroll
Try this:
https://archive.org/details/melba-p-2-1987
Thanks, Alex! That's an interesting find, a VHS rip, I think.
Fortunately, I bought the DVDs in the meantime, a few years back. So I did get my Melba fix ultimately
