I haven't seen any other software that implements DVDisaster's algorithms.
That said, if you're using the RS02 version to augment the ISO with ECC data, how do you propose to process an ISO that doesn't yet exist? The entire process hinges on having an existing ISO to modify. DVDisaster could implement basic authoring capabilities to allow it to build augmented ISOs directly, but it'd still be slow -- calculating all the ECC data simply takes time. They'd also still need to be able to process already created ISOs simply because I doubt they're interested in implementing all the various bells and whistles that high-end authoring programs have.
Either way, it's still very desirable to have a complete ISO created first. Relying on buffer underrun protection to ensure that you have a usable disc doesn't strike me as the safest of ideas for a program designed to protect your data.