The two websites I'd suggest she starts with are CARIAD link here - the coalition to end puppy farming in Wales, which I'm closely involved in. Twenty eight organisations are members, including Hope Rescue mentioned above, I'm glad to say, along with Welsh greyhound charities. 
Then I'd suggest she moves on to Puppy Love link here which is closely involved with doing a lot of the undercover investigations.
Having personally seen (and smelled) the horrors, it's difficult to understand her approach, which is also light years away from the care given by good breeders (and yes, I recognise that there are some out there). Currently, there are licensed puppy farms in Wales where over ninety bitches will be cared for by two people (one only part time). Bitches are routinely kept in the dark, often without adequate food and water, with no bedding or shelter. Accommodation can be in sheds, old horseboxes, stables. Ventilation is poor. Health care is dreadful. After care for bitches is miserable too. Some go on to the Many Tears conveyor belt - a lot never make it off the farms.
We all pay for this. We pay for the licensing officers, and we pay for the strays that eventually clog up our system ( a surprising amount are pedigrees). As dog owners with insurance we all pay - generally puppy farmed dogs are not healthy and the raised premiums they generate are shared by all of us. Reputable breeders are out of pocket and find it difficult to compete since they have extra costs like vet care and decent food and worming for pregnant bitches.
Unfortunately, as others have said, these dispicable places could shut down tomorrow if demand dried up. Your sister is unusual in that she has chosen to face the truth about where her puppy came from. More typically, most puppy buyers choose ignorance - they can get a nice cute pup cheap from Epupz or similar without having to think too hard about where it came from or why it is so cheap or what will happen to its mum.
This is why I never join in with the excitement when there are puppy threads on here - I find it almost impossible to congratulate a new puppy owner without thinking about where it came from. If someone (as people recently have) says that they want to get a puppy, then less than a week later hey presto, a new arrival, you can pretty much guarantee where they are from, especially if they are one of the commonly farmed breeds like Cavs, Labs, Poms, Shitzus, cavapoos, etc etc.
To put into context, Carmarthenshire alone is generating over 20,000 puppies a year from its puppy farms.
Hope this helps, though I'm not optimistic.