Based on info I just read in another thread & forum...blacknight530i (who codes clusters, fixes pixels, & can even get the elusive M cluster's to work fully in non M BMWs)...he just replied that a high cluster from an e38/e39/e53 are all exchangeable but just need the correct coding.
EDIT: found the thread...it was on BimForum's e39 forum:
http://www.bimmerforums.com/forum/sh...5#post29337665