While too soft for forging and just about anything else, these cheap 15lb. cast iron anvils from Harbor Freight make acceptable laps for diamond honing and most of the work is already done. The milled face is easily scraped flat in little time, even if you've never scraped anything before, and with a good charge of 14,000 mesh diamond paste from eBay or otherwise you're good to go for a fast, really sharp final honing step. And since these are in the local HF stores, you can avoid shipping costs.