Be careful what you wish for. ;-) Here's most of my list for BL with single dads finding a gay lover, but I can't remember if the parent is specifically divorced in all cases (in some cases his wife died). And not all of these manga are as good as some. But hopefully you'll find something to like. :)
http://www.mangago.zone/read-manga/oya_no_kao_ga_mite_mitai/
http://www.mangago.zone/read-manga/ookami_papa_wa_hitsuji_tsura_shite_yatte_kuru/
http://www.mangago.zone/read-manga/motoyan_papa_to_hitsuji_sensei/
http://www.mangago.zone/read-manga/gochisousama/ (first 3 chapters)
http://www.mangago.zone/read-manga/ikumen_after/
http://www.mangago.zone/read-manga/mote_papa_to_dakaretai_junjou_koushi/
http://www.mangago.zone/read-manga/koishite_daddy/
http://www.mangago.zone/read-manga/oh_my_hero/
http://www.mangago.zone/read-manga/baby_love_sitter/
http://www.mangago.zone/read-manga/koisuru_barairo_tenchou/
http://www.mangago.zone/read-manga/yozora_no_sumikko_de/
http://www.mangago.zone/read-manga/kazoku_gokko_kikuya_kikuko/
http://www.mangago.zone/read-manga/kozure_ookami_inoue_satou/
Can any one recommend me some yaoi mangas where divorce guys with child fall for gay guys