The part you speak of is also known as the Nelsons hat. Its the front crossmember.
Available at GSF, Heritage and Machine7.
As Calimori says Mega bug for good used parts, they good chpas and deliver quickly.
Keep us updated, I'm restoring my 70 1200 bug too. Check my thread out on here.
Good luck! Remember, straight doesnt necessarily mean good underneath. As mine has taught me!
Stu