Level 16 Gladiator: Spartacus' Retiarii
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Try bookfinder.com and look for European or Canadian sellers in the search results, don't know what is affordable to you but if you can't get it and you really want it I guess the lowest available price is your only option.
I've had fair success finding affordable copies of hard-to-find used and out-of-print books through them, there might be a vendor on there with a copy that can be shipped to Europe (or even a vendor in Europe - they're international.)
In both cases it says it's shipped from USA, but that doesn't mean it can't be delivered in Europe. It just means that the actual resellers are in USA. Look at the two links and compare prices. Make sure to look at each vendor's shipping conditions and prices.