I guess it's possible. Just seems unlikely that anybody owning a vehicle that uncommon with some mods (exhaust note was definitely not stock) wouldn't be aware of this forum. Perhaps he'll see this 6 months from now and chime in.
There's also a guy named Tommy in my area that I spoke with when he saw my car and stopped to check it out. Very knowledgeable on the G3 but apparently not a regular on this site.