Your best bet is eBay unless someone makes an IDS simulator.
I did a search on google, and I really don't think anyone makes an IDS sim. There's plenty of router sims, but nothing for IDS.
These are not cheap devices. Additionally, there are licensing agreements. I don't think you'll find anyone who will "rent" an IDS to you. If you can find someone, best of luck and give me their contact information :-)