I just snipped off the PC end and soldered on a mini-phone plug (mono) from Radio Shack. You can also buy them pre-made from Flash Zebra for about $20.
For tips on using your flashes click the WWW button below for my tutorlals.
and cut the male pc connector off the end. Then cut the mono plug tip off your ebay receiver and splice the proprietary Vivitar connector onto the loose wire from your ebay receiver.
Thanks for the replies everyone. I'm going to go attempt to splice the wires because the Vivitar flash came with a pc-vivitar adapter as shown in the post above.