Optiarc DVD RW AD 7530A ATA device firmware not available?

[nduro1]

I searched for firmware downloads on this site for my Optiarc DVD drive. The search engine responded that none were available. But in the list of available firmware is the model number 7530B which is available. Does anyone know if this model number is an upgraded version? Will it work with the 7530A? If not, then where can I find the correct firmware?

[Chewy]

http://forum.rpc1.org/viewtopic.php?t=43674

This old thread where several of the world's leading firmware experts posted will give you some clues regarding the hoplessness of finding firmware to work on many laptop burners.