It is possible to use PayPal to buy bitcoin through virwox, but the fees will really get you. The fees are about 3.4% of the amount of the transaction + an additional fee(PayPal charge to virwox which virwox then charges to you) that varies depending on currency, location, payment method, transaction size, etcetera.
As an example, the current fee for deposits in Euro for customers with their PayPal account kept in Euro is 0.35 Euro plus 3.4% of the transaction.
So, there could be other sites that offer this service but the fees would probably still be as high since it's mainly PayPal that charges the ridiculous fees. Plenty of other options anyway.