This bow was made by Pearson about 10 years ago so you might want to check with them. I can't remember everything but the modules are marked A thru F or something like that (BHL). Look at the one on the bow and you'll get an idea. Each letter up (A, B, C, etc) means 1" longer draw length. I believe the Solo Lite used the Thruster PHD cam if that will be of any help.
If that doesn't get you anywhere then try Parker Archery as they used the same modules on bows from that era.
You could also get on Pearson's forum and maybe somebody could help you or possibly have a module or two from back then. All mine have magically disappeared over the years.
Martin/Rytera Silver Star Shooter
UBP Life Member
PSAA Life Member
Worldwide Scuba Diver