I never got around to using stainless steel with my springs.  I guess they
just haven't rusted enough to fall apart yet.

Tonight I found these that should be available from PepBoys.

http://www.pepboys.com/product/details/9513006/00128
Dorman - HELP! - Carded HELP! - Carded Exhaust Flange Spring - .5 In. ID x
.75 In. OD x 1.13 In. Length
Part # 03080   SKU: 9513006

They claim to be Rust and corrosion resistant and they are about the right
size.

This modification converts the manifold elbow/j-pipe joint into a ball
joint that really makes installation easier.  Harmonic vibration is
reduced because the exhaust system more flexible.