Nope, i'm the author so i should know
Source projects were lost in the the Great Catastrophic Data Loss of 2012 where i lost pretty much everything... The only problems with converting without source files are the material names; Cicada uses every material available in Race07 and they do not use the same names as rFactor. From the top of my head, there is b1road, b2road, b3road, lgroad, drain at least that are not in rFactor (unless you copy the values from SimBin specialfx.tec to rF)
But it should be possible to convert with 3DSimed and mas utility. If you don't know how to use them, i would have to say that then the conversion needs to be done be a more skilled person to ensure quality
This is not against you in anyway, i have no idea what skillset you have but in general, i've been very critical about conversions and the people doing them (about 50% of addon tracks that are converted have some major issue that takes about a minute to fix, for ex, Hungaroring, 22 max vehicles when there's over 50 grid slots defined... takes just one line in GDB to fix that.. ) So i'm very skeptical about conversions. I know it's very very easy from BTB source do it right but that option is out of the window.
I can ask from betatesters and those that helped me to create the track if they have the latest source but i give that a 1% chance. And i don't accept conversions from earlier sources, the where some major bug fixes and modifications done after the beta tests ended so anything prior to that: no permission granted.. But if i find the sources, i'll PM you.