Hello, and welcome to the forum!
I'm sure if you looked through the gallery someone has saved the parks, and if you can't find them there you can always create a new file and save them there, but if you just want ponds you have another option. If you use the buydebug cheat (bb.showhiddenobjects) you should be able to find ponds in build mode and place them in your current parks (or any lot, really.) This way you don't have to stick with the generic parks if you don't want to, and you can still complete Angling Ace.