You could use the less expensive Hahnemuhle Artproof if you can find it. Very similar printing characteristics to most of the of their other papers. As far as the profiles go, I don't think the ABW mode uses a profile at all, the profile would only be for softproofing from what I understand. But others have more experience and will hopefully be able to help you out.
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Re: [Digital BW] Epson Advanced B&W workflow with non Epson papers
2005-12-18 by Greg