I know there's still a large number of accountants that don't get it yet. It's slowly changing. The most encouraging sign, to me, is that the Institute of Management Accountants has written on the subject, and AICPA and FEI, support the discussion of lean accounting. Your accountants belong to these 3 organizations, so perhaps showing them that their own professional associations at least embrace the discussion might be helpful. Send them this link to IMA's official "Statements on Management Accounting" http://www.imanet.org/publications_statements.asp
. Have them download articles with these titles "Accounting for the Lean Enterprise: Major Changes to the Accounting Paradigm" and "Lean Enterprise Fundamentals". Or perhaps print them yourself and give it to them. The fact that IMA understands this will likely help open their eyes.
Secondly, and I cautiously mention this at the risk of seeming "commercial", but there were over 500 CFOs, controllers, VPs of Finance, etc. at last year's Lean Accounting Summit. This year will meet or exceed that. When I told that to one CFO, his jaw dropped open as he realized he was falling behind.
There's also been 3 books published this year on the subject of lean accounting...
My point is that operations needs to help accounting "get it right" because a growing number are responding. They'll eventually open their eyes, or become even more irrelevant.