Sorry, can't help, for now there is no Mapsource version available.

If you need it just for use in MapSource (not for transfering back in GPS device), MapSource version is posted in post #13:
[Only registered and activated users can see links. ]

or, if you want to merge it with other maps (img) you already have:
[Only registered and activated users can see links. ]

Btw, you don't have to come back to post answer about that thread, I would find it there - I'm reading all new posts every day