i don't know if you have other solution or something like that from others,
you can not find the wallet.dat and you 'mostly' reinstall everything which mean you already wiped out everything in your PC and i am sure everything in your roaming also wiped out ,
oh,right.
how about private key? if you have it you can claim it back.
because i used it to recover my wallet,it is gone too ?
you can not recover it back if you only have the addres,you need 'wallet.dat','private keys'.
if you don't one from both of them,i am afraid you will never get it back again in the future.
for your reference how to recover it if you have that go here:
https://bitcointalk.org/index.php?topic=1783681.0he lost this wallet but he own the private keys,but everything is solved right now because of the private keys