Hi orb85750,
Well the Toaster-to-Flyer cable is just a 20-cond ribbon cable with IDC connectors on each end. They would be fairly easy to make, if you had the materials.
Otherwise, try to contact Ed Jeffries... (I bought my 4000T Toaster/Flyer/PAR system from him), he might either have spares or can make one for you. ( I asked once about a Sync Strainer, he said he had 2 or 3 sitting in a drawer.. :-) )
Contact:
Video Lab - Ed Jeffries
6909 Johnson Dr.
Lower-level
Mission, KS. 66202
Phone: 913-403-0045
Edit: Sorry, I can't say if 2.1 would work for the Toaster, I've only used 3.1 and 3.9 with it...