I cant help much but to point you to some links I know of. The Land Information guys of New Zealand do some fab maps for download and they have modest restrictions on their use. Even if used them for reference then I would check out:
http://www.linz.govt.nz/topography/t...ica/index.aspx
http://www.linz.govt.nz/topography/a...geo/index.aspx
I dont know if they are useful but I know they are large sizes and small scale maps of arctic regions.