I'm going to be placing an order for Old Man Emu "Nitro
Charger" shocks for the syncro special ordered from
Australia (the OME u.s. imporder does not carry them).  This
is the only after market shock that i am aware of that fits
the syncro.  They are gas shocks, valved specifically for
the syncro, high quality materials.  OME shocks have a very
good reputation.  We learned about these from Phill, a
syncro owner in Australia, although he has not tried them.
Price is approximately $415 for a set of 4...not much more
than the stock shocks.  This is a one-time list purchase.
P-mail if interested.
steve