Since Riddle was just a "memory" rather than the actual Riddle, he didn't have a working wand (or that's what I think)-remember he had to "posses" ginny to actualize.
Is it possible the phoenix which contributed the feathers was Dumbledore's FAWKES?
In Goblet of Fire Dumbledore told Harry the Phoenix feather in both Hp's and V's wand is from Fawkes.
If so, HOW did Dumbledore acquire Fawkes' allegiance? and when?
I think Dumbledore's always had Fawkes. I assume he sold a few feathers on ebay, which were purchased by Olivander back when he was a starving young transfiguration professor (when in doubt make something up.)
Thanks for the answers...as for
"makeups," well...why not? That's what
JKR does at times!
Been to this site? Some interesting stuff.
http://www.veritaserum.com/