There is always that supposedly "one-time-item-replacement" from a GM. This MIGHT not apply since you didn't discard them, but I think I read somewhere on here or reddit of a player that did get a tomestone purchase refunded, but that's their "one-time refund."

Think about it - what would someone discard that they can't get back and would be worth this one-time refund? If the answer is "nothing is worth the one-time refund" - then anything is worth the one-time refund.

In the OP's case, it is time. 18 24-man runs is painful. In my personal opinion, I would NOT have bothered upgraded this mid-tier stuff to i630 using those coins. I'd just wait until the last gear patch and turn in all of those 24-man coins from all 3 raids to upgrade weapons that will last until level 100 in the next expansion. But that's just me.