you can just measure them. most shocks are listed by MM and not inches, but you can find a converter on google.

Ill have my new tornado epx pro tomorrow so Ill measure the shocks. The epx pro have full alloy shocks, but they are the same size as the shockwave's. So they are a decent upgrade.

I believe that traxxas t-maxx shocks have been used by others for the shockwave/tornado.