I have searched for an offline maidsafe wallet but couldn't find any, can someone recommand a wallet please?
thanks
You can store it in any BTC address.
https://www.omniwallet.org < create a wallet here and then import the private key of the BTC address where you store your MAID. (Dump the privkey of your BTC address by launching the command dumpprivkey <address> on your wallet console)
If you want more security through a cold storage you can also setup an armory offline address and then import it on your omniwallet.