You mean exactly inflation with semen and not anything else?
that may be hard to find
Strangely enough, I just found this
Not necessarily with semen, but preferred. Also the link doesn't work.
Link works fine you probably just don't have exhentai access
If any kind of inflation if good you should have no problems finding that.
You can even try to find some videos on Pornhub
Tumblr can help, search for inflation and bursting there. Definitely seen a lot of it. Nylonwave has done some, ecchi-panda has done some. People blog Japanese art of inflation bursting too.
Oh yeah, a few others (My alias is taken), (Aeris airways) and Alorok did some too.