J-list has a small selection of eroge. You can also try AmiAmi if you are looking to preorder a upcoming eroge. You can also try mandarake or use a shopping service.
Well, not that the "not to be sold outside japan" thing works much anyway (hint: for starters, most those english-reading immigration checkers can't read JPN+they skip over the small-worded notice too haha)
Hasn't stopped me from importing any JPN stuff.
Of course you could always buy the eroge digitally online through MangaGamer or dmm.com
Hi.
Is it possible for you to upload this game?
・マブラヴ
・マブラヴ オルタネイティヴ トータル・イクリプス
I have searched as far as I could find, but could not confirm it, so I am contacting you to inquire about it.