Replacement PSU for UR242 (UK)?

Hi, i recently purchased a UR242 on ebay, but the seller has either forgotten to send the PSU or never received one when she initially purchased it as it was advertised as not used, unopened.
I will return the item if i can not find a way to test this, and make it work, but my dilemma is i really want it to work as its my top choice for an interface.

Is there anyway of buying a replacement power supply, and how much would it cost?

It’s just a 5V wall wart, easily obtainable in all kinds of electronics stores, depending on in which country you live. With the proper cabe you can also run it from a phone charger or a USB 3 on your computer.