Found a BBW BE doujin.

[wasurenai]

Source is an anonymous on 4chan, who said he pulled it off 2chan. It looks incomplete, especially given the huge jump between the ones I have marked as pages 8 and 9 (the scan quality is different as well, indicating that they were scanned in by different people).

I'm currently looking for the whole thing. If I come across it, I'll let you know.

Warning: Art style and content may be unappealing to some, but it's definitely a huge BE. You've been warned.