Acquiring Cyprinus is not an issue, I've been dip netting 2" individuals for the past few nights. They will be quarantined and de-parasitized in a seperate tank.Problem is that it's difficult to find young common carps for sale due to the laws and the fact that they are invasive species. Also it might takes a while to find the common carps while the koi carps are already available. Problem is that common carps often carrying parasites that might pose a threat to your only one saimese carp.
Looks like I'm going to be doing commons! Any other suggestions?