Yamato 1/60 VF-1S v1.0(?) -- Looking for spare part

First post here for me ... awesome site, all!! I'm not a diehard collector by any means, however I do enjoy collecting Macross items and 1:18 Diecast cars, mostly.

Onto my question: (Please forgive my ignorance and if I posted in the wrong place)

I have a Yamato 1/60 VF-1S v1(?). Somewhere during the course of moving, I lost a part on it. I'm hoping that someone could provide information on where I could possibly purchase a replacement. It's the rubbery-type piece located underneath the cockpit area where the legs attach to the 'torso'. Please see the accompanying pic. (Used a friend's model to show the part)

Thanks in advance!