Interesting thread....
I, too, believe that skaters borrow & use costumes frequently......why not

.......definitely saves on cost and how generous & nice to do so also. Maybe with a little altercation here & there, especially as the original skater probably won't use it again. Unless it's a very
special costume (ala Olympic costumes that are on display in some museum or other). Otherwise, go for it!
As to the original question, I believe that one of the Asada sisters (Mai or Mao) used a costume of their legendary countrywomen,
Midori Ito, at Japan Nationals last year. The younger Asada sister btw........the one whom landed a 3/3/3 (severely underrotated but great try) at Nationals last year.........real cutie too ~ costume was a lovely shade of blue with white ruffles/flounces (hard to describe). Anyhow, how kind of Midori to do so ~ and it helped obviously.

^D
One more note, I was completely blown away when I saw a brief pic of Jennifer Kirk's SP costume this year!

It looked
exactly like the one that Oksana Baiul wore in the opening number of COI in 2000 ~ where she danced briefly to the "Macarena Song". Gorgeous dress btw; definitely rates as one of my all-time favorite dresses ever (bar none). Anyhow,
if it is the same one, I say "right on"!
Peace & Love, Nadine