Not sure how you lose a !! Clone... unless you let your Tama die and lost all your items of course
The only way to get stuff back is to key in the codes again.
You didn't mention if you had the V3 or the V4 Clone - so I guess you should visit the TamaTalk Tamagotchi Codes forum: https://www.tamatalk.com/IB/index.php?showforum=44 and find the right codes there
If you haven't reset your Tama then you'll have to pay for a new Clone - it is only free once