I made my own a while back for fun using this guide.
andarazoroflove org/how-to-create-alt-coin-scrypt-clones-for-fun-and-profit-bitcoin-litecoin-secrets-exposed/
You need two computers, which can be on a LAN, with one of them running a linux distro. I installed Ubuntu on an old laptop for this, and learned as a I went. It's a good excuse to learn a bit about programming and linux, you should be able to get one up and running within a few hours. Good luck!