Wand of Dowsing in combat

[Mr P]

Hi! In the spanish forum of Munchkin a buddy ask for the next situation:

A 9th level player was in combat which could make him win, so another player decided to use the Wand of Dowsing to take a monster from the discard pile and use it with a wandering monster from his hand and you know... some of the players agreed, anothers dont.

I've looking throught the forum about the WoD and found this post of MunchkinMan:

Treasure cards can only be played on your turn or as soon as you get them, except (generically) GUAL cards (any time) and one-shot Items (during any combat). Other cards specifically say if they can be played at any time. WoD is a Treasure card and does not say it can be played other than on your turn.

In the 19th rules you can find:

Items –Using Them
Any one-shot item can be played during any combat, whether you have it in your hand or on the table. (Some one-shot items, such as the Wishing Ring, may also be used outside of combat.)
Other items cannot be used unless they are active. Items turned sideways cannot help you, even if you could otherwise legally use them.
Other Treasures
Other Treasure cards are “specials” (like “Go Up A Level”). You may play these at any time, unless the card itself says otherwise. Follow the card’s instructions, then discard it, unless it has a persistent bonus like an Item.

Can they consider the WoD a one-shot item? It's true you can only use it once but I didn't think so...