Could anyone correct my transcription?

Sperm donor: 'I've fathered 800 children' http://www.bbc.com/news/health-35303274

Simon Watson said, "I'd like to get the world record ever to make sure no one's gonna break it get as many as possible. Easy about one a week pops out, so I reckon I've got like 800 or so, so far, so within about 4 years I'd like to crack about a thousand. If I can."
Meet the man who says he's fathered up to 800 children. Simon Watson said, "Yeah, I just picked up results from the hospital. I get tested every 3 months or so. ??? ??? nasty things. I always post a copy on the internet so that people can see it for themselves. My name's Simon Watson. And I'm sperm donor." [There should be an "a" before "sperm", but I can't hear it.]
Fertility clinics in the UK are regulated by the Human Fertilisation and Embryology Authority. They have strict rules on screening sperm for infectious such as HIV and certain genetic disorders. Simon Watson said, "If you go to a fraternity clinic, there's loads of hurdles you got to go through. They make these people sit through counseling sessions, and they make them go through huge amounts of tests. And then they charge them fortunes for the service, but realisticly if you got a private donor, you can just go to see them, meet them somewhere, get what you want, and just go, that's it. It's all sources." [I don't know what his last sentence here is.]
Very few women are eligible to have artificial insemination on the NHS.
Private clinics cost between 500 pounds and 1000 pounds for each cycle of treatment.
Simon Watson said, "I charge them 50 pounds. And that's it for the magic portion pop, and then I'll give them a syringe with the pop and then leave them to it." ["Pop" is not a common word; it might be slang from where he's from.]

Yeah, he has a thick accent and hearing him when he's outside or driving is not easy...