Sacramento Installation Help?

Hi all,

Just bought a new Robbins top from mmmiata.com:
"Robbins Premium Miata Top with Glass Window zip 90/97 BK Sunfast Top Glass
Window zip, w/ rail"

....and dropped it off at Great Valley Mazda...

They say that the left tension cable is busted, and that while it is a Mazda
part, they cannot order it without ordering an entire new top frame @ $800+.

Any ideas on whether I should leave the top at Great Valley, and dedicate my
efforts to finding the tension cable, or can anyone recommend a good shop
that has maybe seen/installed a Robbins top in the past?

Thanks,
%Joe%